Article Journal of European Social Policy 2022, Vol. 0(0) 1–16 Weathering the storm together: © The Author(s) 2022 Does unemployment insurance help Article reuse guidelines: couples avoid divorce? sagepub.com/journals-permissionsDOI: 10.1177/09589287221141363 journals.sagepub.com/home/esp Dorian Kessler Debra Hevenstone Bern University of Applied Sciences, Bern, Switzerland Leen Vandecasteele University of Lausanne, Lausanne, Switzerland Samin Sepahniya University of Applied Sciences and Arts Northwestern Switzerland, Olten, Switzerland Abstract This study examines whether unemployment insurance benefit generosity impacts divorce, drawing on full population administrative data and a Swiss reform that reduced unemployment insurance maximum benefit duration.We assess the effect of the reform by comparing the pre- to the post-reform change in divorce rates among unemployed individuals who were affected by the reform with the change in divorce rates among a statistically balanced group of unemployed individuals who was not affected by the reform. Difference-in- differences estimates suggest that the reform caused a 2.8 percentage point increase in divorce (a 25% increase). Effects were concentrated among low-income couples (+58%) and couples with an unemployed husband (+32%) though gender differences are attributable to men’s breadwinner status. Female main breadwinners were more strongly affected (+78%) than male main breadwinners (+40%). Results confirm the ‘family stress model’ which posits that job search and financial stress cause marital conflict. Policymakers should consider a broad array of impacts, including divorce, when considering reductions in unemployment insurance generosity. Keywords Unemployment insurance, divorce, income, unemployment benefits, family stress, quasi-experiment Introduction Corresponding author: Unemployment insurance was designed to alleviate Dorian Kessler, Department of SocialWork, Bern University of the hardship of unemployment. Until the recent Applied Sciences, Hallerstrasse 8, Bern 3012, Switzerland. COVID-19 pandemic there was a trend towards Email: dorian.kessler@bfh.ch 2 Journal of European Social Policy 0(0) reducing unemployment insurance generosity across be biased given different trends in family formation the OECD (Biegert, 2017; Gschwind, 2021; OECD, and dissolution by social strata (Cherlin, 2020). 2018). This was partly premised on findings that Second, a number of studies from the social policy generous unemployment benefits extend unem- literature examine policy changes that include si- ployment duration (Mortensen, 1976; for an over- multaneous variations on multiple policy dimensions view see: Schmieder and Von Wachter, 2016). (for example, generosity and activation requirements) In contrast, the literature on the effects of un- (Bitler et al., 2004; Halla et al., 2016; Van Winkle, employment benefits has paid little attention to 2020). For these studies, it is difficult to attribute outcomes such as health (Kuka, 2020; Shahidi and effects to specific policy changes. Third, some studies Parnia, 2021) and subjective wellbeing (Carr and use relatively small experiments (Goñalons-Pons and Chung, 2014; Rose, 2019; Wulfgramm, 2014). With Calnitsky, 2021), finding increases in discord due to respect to families, there is just one study examining cash transfers but not divorce. This could simply be divorce and fertility (Lindo et al., 2020). From the due to the small sample, as divorce is a rare event. In comparative social policy literature we know that studies using survey data, sample size problems are other welfare state programmes impact family sta- exaggerated due to panel attrition (Vandecasteele and bility (Bitler et al., 2004; Halla et al., 2016; Van Debels, 2007). Winkle, 2020), suggesting a likely, though insuffi- The study improves on each of these shortcomings. ciently explored, relationship between unemploy- First, both our treated group and control group include ment insurance and divorce. unemployed individuals, which allows for more re- This article takes an important step in filling this liable comparisons of changes in divorce rates than gap in our knowledge, using full population adminis- comparisons with continuously employed individuals. trative data from Switzerland and a quasi-experimental Second, our design examines a policy change in design to examine whether a reduction in maximum maximum benefit duration allowing us to isolate ef- unemployment insurance benefit duration impacted fects of benefit generosity. Third, we use full pop- the likelihood of divorce. We exploit a Swiss policy ulation linked register data that is not prone to panel reform which reduced maximum benefit duration attrition, allowing us to detect even small changes in from 1.5 years to one year. The reform increased divorce and examine heterogeneous effects by income pressure to find a job and shortened unemployment group and gender. Given Switzerland’s high levels of duration for individuals shortly before or after ex- average wealth (Kuhn, 2020) and generous social hausting one year of benefits and reduced benefit assistance (Obinger, 1999), these results can be seen as income for those exhausting one year of benefits. a ‘least likely’ case, meaning that if unemployment We measured the effect of the reform on divorce by benefit generosity affects divorce in this context, it is comparing the pre to post reform change in divorce likely relevant in any context. rates among unemployed individuals affected by the reform (treated) with the change in divorce rates Income shocks and divorce among a statistically balanced group of unemployed individuals who were not affected by the reform The literature on how income shocks, such as those (controls). caused by the reform, affect divorce can be broadly Our study offers key improvements over the lit- summarized into two groups: a) findings that are erature on the positive effects of unemployment in- interpreted in support of the family stress model and surance and the literature on social policy and family b) findings that are interpreted in support of the cost stability. First, Lindo et al. (2020), the only other study and independence hypotheses. on the effects of unemployment benefits on divorce, examine the effect of changes in unemployment The family stress model benefit generosity on divorce in the US, but compare changes in divorce among the unemployed to those First, there is the argument that economic stability without unemployment spells, a comparison that could contributes to marital stability. This is often Kessler et al. 3 summarized as the family stress model and linked to unemployment benefit generosity, but not those of the work of Rand Conger and Glen Elder (Conger unemployed women. et al., 1990, 1994, 2010). The central argument is that a lack of economic resources induces a chain of The cost/independence hypothesis negative events for couples. With an income loss, households might reduce expenditures, have diffi- A second set of arguments can be summarized as the culties paying bills, or be unable to meet con- cost/independence hypothesis which stresses the role sumption needs. This economic stress then translates of economic resources in a) helping couples bear the into psychological stress (Inanc, 2018) through economic cost of separation and in b) fostering conflicts related to finances (Goñalons-Pons and economic independence from a partner. Calnitsky, 2021) eventually leading to low rela- The high cost of divorce is one potential reason tionship satisfaction, and ultimately divorce (Blom why a negative income shock might depress divorce. et al., 2019a, 2019b; Conger et al., 2010; Di Nallo Divorce is costly as the dissolution of the household et al., 2022). into two new households leads to the loss of econ- A gender-focused extension of this argument is omies of scale. Furthermore, divorce comes with that conflict increases not only in response to income considerable direct costs such as legal fees (Boertien loss but depending on whose income has been lost. and Lersch, 2021). A decrease in benefit income Stress and conflict might be higher when gendered might thus lead couples who were considering di- expectations are not met. An income loss of the male vorce to delay it. partner indicates a failure to follow the male A second reason a negative income shock might breadwinner norm (Cherlin, 2020; Townsend, 2010; depress divorce is explained by the economic in- West and Zimmerman, 1987), whereas an income dependence hypothesis (Becker et al., 1977; Özcan loss of the female partner is not at odds with prev- and Breen, 2012; Sayer and Bianchi, 2000). The key alent norms. Thus male income loss, more than fe- argument is that marriage is attractive for those with male income loss, translates into increased conflict limited individual resources as they can depend on and marital instability (Bertrand et al., 2015; Blom the income support of a spouse. With no employment et al., 2019b; Goñalons-Pons and Gangl, 2021; income, a decrease in benefit income could decrease Inanc, 2018; Killewald, 2016; Kim and Luke, 2020). the unemployed individuals’ economic indepen- The family-stress model and its gender-focused dence and reduce divorce (Bitler et al., 2004; Halla extension are supported by some empirical evidence. et al., 2016). However, it must be noted that, when Goñalons-Pons and Calnitsky (2021) show that cash seen from the perspective of a spouse who depends transfers in the Manitoba Negative Income tax ex- on the unemployed spouse, a decrease in benefits periments reduced money-related conflict in couples. could also increase divorce as the attractiveness of Several longitudinal studies have shown that re- marriage is reduced. ductions in men’s employment incomes lower rela- Several experimental and quasi-experimental tionship satisfaction and increase divorce (Bertrand studies are interpreted as supporting the cost and et al., 2015; Blom et al., 2019b; Di Nallo et al., 2022; independence arguments. Analysing the impact of Killewald, 2016), while women’s incomes are less the US welfare reform in the 1990s, Bitler et al. clearly related to divorce (Killewald, 2016; Özcan (2004) concluded that the introduction of policies and Breen, 2012). This association is more pro- restricting access to benefits and promoting work nounced in contexts with stronger gender norms (work requirements, sanctions, time limits, and (Goñalons-Pons and Gangl, 2021). Boertien (2012) lowered income tax rates while on welfare) reduced finds that income from lottery wins increases rela- the risk of divorce in states adopting these policies. tionship satisfaction and reduces the chances of Groeneveld et al. (1980) showed that income separation, but only if the male partner won. Simi- transfers in the Seattle–Denver Negative Income Tax larly, Lindo et al. (2020) showed that divorce rates experiments led to an increase in the divorce rate. of unemployed men decrease with increased Bobonis (2011) analysed the conditional cash 4 Journal of European Social Policy 0(0) transfer programme in Mexico (Progresa) and found covered and income is insured up to 148,200 CHF/yr. small increases in divorce rates related to more In terms of eligibility requirements and replacement transfer income for women. Francesconi et al. (2009) levels, the Swiss unemployment benefit system is showed that working tax credits in the UK (in-work rather generous compared to other OECD countries. benefits) significantly increased divorce rates in In a reform implemented in April 2011, the couples with low-earning men. Finally, using an maximum benefit duration was reduced for the sub- instrumental variable design, Halla et al. (2016) have population of unemployed aged 25–55 with in- shown that in OECD countries, increases in national complete contribution histories.3 Prior to March social spending are related to higher divorce rates. 2009 benefit recipients with contributions of 12–17 Hence, the literature on how income shocks im- months in the 24 months before claiming benefits pact divorce does not lend uniform support to either were entitled to a maximum of 400 daily allowances the family stress model or the cost/independence (∼1.5 years of benefit receipt).4 Following the re- hypotheses (see Table 1A (appendix) for an over- form, in April 2011, the same group was entitled to a view of the most relevant studies). One possible maximum of only 260 daily allowances (∼1 year of explanation for these inconsistent findings could be benefit receipt) (SECO, 2013). This means that the that both mechanisms operate simultaneously with reform reduced maximum unemployment benefit one dominant for specific subgroups. For example, a entitlement by 6 months for prime age workers with higher ability to bear the cost of divorce after a incomplete contributions. Unemployed individuals positive income shock likely only translates into in the same age group with longer contributions were more divorce among couples who were already entitled to 400 days of benefits (∼1.5 years of benefit unhappy (Goñalons-Pons and Calnitsky, 2021). receipt), both before and after the reform. Unemployment insurance in Switzerland and The expected effect of the reform on divorce the 2011 reform The reform reduced benefit income for those ex- Unemployment benefit systems can be described by hausting one year of benefits and increased pressure to various characteristics, including eligibility re- find a job even earlier than that. The family stress quirements, income replacement levels, and maxi- model predicts that these changes should lead to more mum benefit duration (Schmieder and Von Wachter, marital conflict and, ultimately, divorce. Arguments on 2016). In Switzerland, eligibility depends on reason economic dependence also anticipate more divorce for job loss, willingness to work, and paid unem- when taking the perspective of the spouse of the ployment insurance contributions. Benefits are paid unemployed. Due to benefit cuts, previously depen- for both involuntary and voluntary job loss, with a dent spouses can depend less on their unemployed waiting period in the latter case. Recipients must partner. This reduces the attractiveness of the marriage write a minimum number of job applications per relative to finding a new partner. month and potentially participate in employment programmes, both determined by the recipient’s Hypothesis 1a: The reform increased divorce. caseworker. Furthermore, the recipients must have been employed in a job that paid social contributions From the viewpoint of the economic dependence into the Swiss unemployment benefit system for a of the unemployed spouse, however, the reform minimum of 12 of the last 24 months.1 The re- should increase economic dependence, as he or she placement level is stable throughout the unemploy- must rely on their spouse after their benefits are cut, ment spell at 70% of the previous salary for those reducing divorce. A reduction in divorce is also without dependents and 80% for those with depen- anticipated by the cost hypothesis as a reduction in dents or an income below 3797 CHF/mo.2 Those benefit income makes it more difficult for the couple with annual earnings below 6000 CHF are not to afford a divorce. Kessler et al. 5 Hypothesis 1b: The reform reduced divorce. (Goñalons-Pons and Gangl, 2021; Killewald, 2016). This would mean that couples experience greater The literature also suggests testable hypotheses increases in conflict and divorce when husbands were about how these mechanisms play out among certain affected by the reform, even after considering their subgroups. The family stress mechanism should be greater income contribution to the household. more pronounced for couples with lower household incomes who already suffer economic stress. Hypothesis 3a: The reform increased divorce more for couples in which the unemployed spouse was the Hypothesis 2a: The reform increased divorce more husband, irrespective of men’s greater relative income for couples with a low household income before contribution. unemployment. In contrast, the cost hypothesis would anticipate The cost hypothesis also suggests that couples that the reform suppresses divorce more when the with fewer economic resources were more strongly unemployed spouse is the husband, because of the affected by the reform. A low-income household is greater income loss. From the viewpoint of cost, more likely to drop below the threshold at which they gender norms play no role, meaning that any gender can shoulder the cost of divorce and maintain two effect should be explained by men’s greater incomes. separate households. Thus, if the cost hypothesis holds, it should also be stronger for low-income Hypothesis 3b: The reform decreased divorce more for couples. couples in which the unemployed spouse was the husband. Hypothesis 2b: The reform decreased divorce more for couples with a low household income before If changes in economic dependence are the unemployment. dominant mechanism, however, the reform should suppress divorce more when the unemployed spouse We also expect the reform’s effect to differ ac- is the wife. Given husbands’ higher earnings, wives cording to the unemployed spouses’ gender. On the losing benefits become even more dependent. Their one hand, there are arguments supporting the expec- husbands, not relying on the unemployment benefits tation that increases in divorce caused by the reform of their wives anyhow, likely won’t react either way. are stronger for men than for women. Gendered norms In contrast, for an unemployed man losing benefits, on breadwinning lead to differences in the relative their wives are less able to support them, implying income contributions to the household by unemployed that unemployed men do not become more depen- men versus unemployed women. Unemployed men dent when they lose benefits. Their wives, however, have more insured income, lose more when benefit as described earlier, are more likely to seek a new eligibility is reduced, and can rely less on their part- partner. Jointly these facts suggest that if the reform ners’ income – meaning more stress caused by the suppresses divorce, it should do so more for un- reform for men. In addition, seen from the perspective employed wives. of a dependent spouse, the attractiveness ofmarriage is more strongly reduced by men’s versus women’s loss Hypothesis 3c: The reform decreased divorce more for of benefits. couples in which the unemployed spouse was the wife. Beyond the fact that men contribute more income to the household, gender norms could exacerbate the stress caused by the reform. There is a strong cultural Methods expectation that men contribute to the household. The Data stress associated with benefit loss is thus likely greater for unemployed men, irrespective of the amount of To test our hypotheses, we used linked full pop- benefit they lose or how much their wives earn ulation register data from Switzerland. Civil status 6 Journal of European Social Policy 0(0) register data provided us with information about likelihood of divorce.7 Also, simply comparing the marriages5, births, deaths, and divorce from 2000 to change in divorce rates of the treated before the 2018 (FSO, 2019).6 Unemployment insurance register reform to the treated after the reform would lead to data (2000–2015) added information on the timing of biased estimates of the reform’s effect, as the like- unemployment spells, the characteristics of the un- lihood of divorce changes across cohorts, for ex- employed (pre-unemployment income, working ample due to changing norms. hours, education, occupation) and unemployment Given that the timing of the reform was unrelated benefit receipt (contribution history, maximum num- to divorce (see Footnote 4), however, it seems ber of benefits, sanctions, actual duration of benefit plausible that the pre-to-post-reform change in di- receipt) (Federal Council, 2006). Finally, social se- vorce rates among the treated would have been curity data on individual accounts included earned identical to the change in divorce rates among the employment income, self-employment, and social controls, had the reform not taken place. If this holds, insurance income (unemployment benefits, maternity, any observed difference in the change in divorce wage replacement during mandatory military service) rates between the two groups reflects the causal effect for both spouses from 2000 to 2016 (Central of the reform. We measure differences in the change Compensation Office (CCO) 2018). using a repeated cross-sectional difference-in-dif- ferences research design, which, due to the random Study design timing of the reform, can be called quasi- experimental. Figure 1 (upper panel) displays Measuring the effect of the reform by simply com- the definitions of treated and controls in the pre- paring divorce rates between those affected by the and post-reform cohorts, based on contributions reform (treated, 12–17 of 24 months of contribu- and corresponding maximum benefit durations. tions) versus those not affected by the reform Due to the design of the reform, both treated and (controls, 18–23 of 24 of months of contributions) controls were limited to individuals aged 25 to 53 would lead to biased estimates, as individuals with whose unemployment spells lasted at least nine more interrupted employment histories have a higher months.8 Figure 1. Study design and sample selection. Selection of treated and controls, benefit duration among treated and controls in the pre- and the post-reform period (upper panel), and selected unemployment spells and marriages (lower panel). The effect of the reform is measured with (B-A) – (D-C). Kessler et al. 7 Adverse selection. A potential threat to the validity of individuals married between October 2006 (3 years the research design is adverse selection, that is, the and 6 months between the first marriages and the first possibility that following the reform more capable unemployment spells, as for the pre-reform sample) individuals postponed quits and layoffs until they and December 2015 (6 years and 3 months between had 18 months of contributions. Such strategic be- first and last marriages, as for the pre-reform sample) haviour would create differences in divorce rates due and whose unemployment spells started after April not to the causal effect of shorter benefit eligibility, 2010 (the first date unemployment spells started in but due to compositional shifts between treated and the post-reform regime). With this definition, there controls. were 21,269 couples. After removing the 5.2%with a To test for strategic behaviour, we plotted the missing value on at least one of the study variables, share of individuals with a tertiary degree among all the sample was 20,161. (Due to the small amount of individuals registering for unemployment with at missing information, we simply dropped these ob- least 18 contribution months for all monthly cohorts servations). We ended up with 4456 treated and 6331 between January 2009 and December 2011 (see controls before the reform and 3124 treated and 6250 Figure 1A (appendix)). If there was strategic be- controls after the reform. haviour among more capable individuals, then we Table 1 presents the descriptive statistics for the would have seen a sudden increase in the share of four groups. By definition the treated group had been individuals with a tertiary degree after the reformwas employed for fewer months in the 2 years prior to accepted in the popular vote in September 2010 or unemployment and had lower levels of education and after it was introduced in April 2011. The data does occupational status. The last column of Table 1 not show a sudden increase, but rather the contin- presents the coefficient of the respective character- uation of a steady trend in increased tertiary degrees. istics regressed on an interaction term between the There was similarly no sudden increase using al- treatment and period (pre-reform vs post-reform) ternative measures of selection such as earnings in variables with statistically significant effects of this the last job before unemployment (not reported). DiD estimator for several variables, suggesting dif- ferences between treated and controls that changed Sample following the reform. We adjust for these differences by including all variables in Table 1 as control We restricted observations to those individuals whose variables in our multivariate models and by bal- marriage took place prior to or in the first year of ancing the four comparison groups to match the unemployment and remained married throughout the characteristics of the treated post-reform (see the first year of unemployment. Among couples with section on Analytical strategy). multiple unemployment spells after marriage, we se- lect the first spell (taking a random spell if both spouses Variables registered for unemployment on the same day). For the pre-reform sample, we selected all indi- The outcome variable is whether the couple was viduals married between January 2000 (the earliest legally divorced. Using this measure, the effects of date that we could measure unemployment after the reform will have a substantial lag. Using data marriage) and March 2009 (the last date unem- from the Swiss Families and Generations Survey ployment spells started that were not affected by the (Federal Statistical Office, 2021) we find an av- reform). Among these, we selected those for whom erage lag of one year and 9 months between the the first unemployment spell after marriage started year of self-reported separation and the year of between July 2003 (the first date unemployment divorce in the general population in our study spells started in the pre-reform regime)9 and March period. Given that unemployment is associated 2009 (the last date unemployment spells started that with even longer time lags between separation and were not affected by the reform, see Figure 1, lower divorce (Tumin and Qian, 2017), this can be seen panel). For the post-reform samples, we selected all as a lower bound for our sample. Second, the 8 Journal of European Social Policy 0(0) Table 1. Characteristics of treated and controls and trends from before to after reform. Treated Controls DiD Pre Post Pre Post UI contribution months 14.01 14.18 21.58 21.48 0.27*** Education: Tertiary 0.23 0.28 0.24 0.32 0.03* Upper-secondary 0.45 0.35 0.52 0.41 0 Less than vocational 0.32 0.37 0.24 0.26 0.03* Occupation: Managerial/professional 0.16 0.15 0.21 0.24 0.04*** Clerical/Services/Sales/Skilled agricult 0.48 0.43 0.53 0.48 0.01 Craft/Plant and machine operators/Elementary 0.35 0.42 0.26 0.27 0.05*** Citizenship: Swiss 0.29 0.2 0.47 0.39 0.01 Foreign: Neighbouring countries 0.11 0.13 0.15 0.17 0.01 Foreign: Non-neighbouring countries 0.6 0.67 0.38 0.44 0.02 Age at marriage 32.19 31.66 32.94 32.52 0.11 Partner age at marriage 34.42 33.55 33.59 33.51 0.79** First marriage 0.73 0.77 0.72 0.77 0 Age at unempl. Start 33.98 33.81 35.05 34.98 0.1 Employed y. Before unempl 0.96 0.96 0.97 0.97 0 Income y. Before unempl. (CHF 1000/yr.) 35.43 31.08 53.66 57 7.69*** Working hours before unempl. (100 = 42 hrs./wk.) 89.61 86.5 88.91 88.47 2.67*** Desired working hours (100 = 42 hrs./wk.) 92.33 92.89 88.47 89.48 0.44 Sanctions 4.94 5.33 5.87 6.81 0.56* Waiting days 3.35 3.11 3.75 3.97 0.45*** Partner employment y. Before unempl 0.79 0.8 0.81 0.8 0.02 Partner income y. Before unempl. (CHF 1000/yr.) 47.65 48.66 53.71 59.08 4.36** Number of children: < Age 4 0.4 0.42 0.5 0.55 0.03 Age 4–6 0.12 0.13 0.14 0.16 0.01 Age 7+ 0.17 0.13 0.23 0.18 0 Hh. Income year. Before unempl. (CHF 1000/yr.) 83.08 79.74 107.37 116.08 12.05*** Region: Lake geneva 0.3 0.31 0.29 0.33 0.03* Central lowlands 0.21 0.21 0.19 0.17 0.02 Northwest 0.1 0.1 0.11 0.12 0.01 Zurich 0.19 0.19 0.2 0.18 0.01 East 0.08 0.09 0.09 0.1 0.01 Central 0.06 0.05 0.06 0.05 0 Ticino 0.05 0.05 0.05 0.05 0 N (couples) 4456 3124 6331 6250 — Treated: 12–17 months contributions in the 24 months before start of the UI spell. Controls: 18–23 months contributions. Pre ob- servations: Married between Jan 2000 and Mar 2009, start of unemployment between Jul 2003 and Mar 2009. Post: Married between Sep 2006 and Dec 2015, start of unemployment between Apr 2010 and Dec 2015. DiD = interaction term between treated versus controls and pre- versus post-reform. p-value thresholds DiD: * = 5%, ** = 1%, *** = 0.1% divorce process itself (that is, the time between the granted in 2008, there was a 9-month lag between moment couples file for divorce and the moment filing for divorce and the divorce being legally the divorce is legally granted) can take a long time. granted.10 Together, the total lag between sepa- Analysing divorce register data, for divorces ration and the legal enactment of divorce is Kessler et al. 9 between 2 and 3 years. The effects of the reform group. βDiD expresses the difference between treated would thus be expected in years 3 and 4 after the and control group in the change from the pre- to the year the unemployment spell began. Given this post-reform period – the difference-in-differences time lag, we measure cumulative divorce up to estimate of the effect of the reform. To remove co- 4 years after the start of unemployment. variate imbalance, we use entropy balancing (see We define household income as income from Table 2A (appendix)). Entropy balancing generates employment and social insurance from both partners weights that adjust means in all comparison groups to in the calendar year before unemployment. In the those in the treated group post-reform. Compared to presented analysis, we examine income terciles, but adjustment using linear control variables, entropy smaller categories (quartiles and quintiles) were also balancing reduces the dependence of treatment effect tested.11 estimates on model specification (Hainmueller, We measure the relative income contribution of 2012). We report results using entropy balancing the unemployed spouse using the share of the total in the main article and results using regression in the household income in the calendar year before un- Online appendix. To further strengthen conclusions employment. To estimate simultaneous differences on the causal effect of the reform, we consider the by gender and relative income contribution (Hy- trends in divorce among treated and controls before pothesis 3a), we used a binary indicator dis- the reform: if divorce trends in the two groups were tinguishing between ‘primary earners’ (relative parallel before the reform, then a divergence in di- income contribution greater than 50%) versus ‘sec- vorce trends between the two groups just when the ondary/non-earners’ (50% or less). reform happened suggests that this is due to the causal effect of the reform. Analytical strategy. To capture the effects of the re- form on divorce, we use linear probability models (LPM) on the stock of divorced couples in each year after unemployment start with the dependent var- Results iable of whether a couple has had a divorce yet. Overall effect of the reform Compared to event-history analysis of person-year data, our approach is less prone to statistical noise Figure 2 displays the share of couples who were (present in annual separation rates). Given that divorced in the years following an unemployment divorce is a relatively rare event impacting about spell in the four groups (treated/control, pre/post- 10% of the couples in our sample, we also compare reform). The lower panel includes difference-in- results using a logit model (presented in the Online differences estimates and 95% confidence intervals. appendix). For all four groups, the share of couples who are We measure the effect of the reform with an in- divorced increases relatively steeply in the years teraction term between a dummy variable for after an unemployment spell. Also, there is a clear whether the unemployment spell took place in the increase in divorce rates between the two periods, pre-reform or post-reform period and a dummy illustrating an increasing trend in divorce in variable for the unemployed spouse belonging to the Switzerland over this period. What is important is treated or the control group. Our model is: that divorce rates before the reform are identical for treated and control couples (gray lines) while Divorced ¼ β0 þ βT  XT þ βP  XP þ βDiD  XT  XP after the reform divorce rates for the treated ac- celerate. The treated group’s relatively higher di- β0 denotes the intercept, βT the coefficient that vorce rate increases steadily in the years after estimates the effect of being in the treated versus unemployment starts, only reaching statistical control group in the pre-reform period and βPost the significance in the fourth year. This confirms coefficient that estimates the effect of the change Hypothesis 1a, showing an increase in divorce due from the pre- to the post-reform period in the control to the reform. 10 Journal of European Social Policy 0(0) Figure 2. Effect of the reduction of unemployment benefit duration on divorce. Levels in treated/controls and pre/post- reform and cumulative difference-in-differences of the share of couples divorced by year after unemployment start (95% confidence intervals). Results based on entropy-balanced samples. The estimated effect of the reform is a 2.8 per- and the controls before the reform. Before the re- centage point increase in the share of couples who form, trends in divorce were parallel between divorce (Figure 1, bottom panel). Relative to the treated and controls (with covariates unbalanced, counterfactual level of divorce in the treated group left hand panel) or even steeper among the controls (the observed post-reform level of divorce minus the (with covariates balanced, right hand panel). Hence, treatment effect = 14.1–2.8 percentage points = 11.3 extrapolating this trend to the post-reform period percentage points) this is a 25% increase in divorce without the reform’s effect, one would expect a due to the reform.12 parallel increase in divorce between the two groups It is possible that the greater difference in di- (resp. A stronger increase among the controls). vorce among the treated after the reform is not due Instead, we find stronger increases in divorce to the causal effect of the reform, but due to di- among the treated just after the reform (cohort verging trends in divorce between the two groups 2010–2012), in line with the expectation that the that already existed before the reform. To test this, difference between treated and controls in the post- Figure 3 shows trends in divorce among the treated reform sample is due to the reform. Kessler et al. 11 Figure 3. Trends in the level of divorce before and after reform, divorce stock measured in the fourth year after unemployment start, balanced and unbalanced control groups, 95% confidence intervals. From a policy perspective, it is important to consider following unemployment. The divorce rate among the effect of the reform on divorce (+25%) in the context couples in the lowest tercile increased by 5.8 per- of other reform effects including losses in benefits and centage points (a 56% higher divorce rate than in increases in employment and income. Those reaching at the absence of the reform). In the middle tercile least 9 months of unemployment received CHF 9770 there is an increase in divorce of 2.8 percentage less in benefits, which is a 23% loss (concentrated in the points that is not statistically significant, while the second year of unemployment,55%). Benefit loss was reform has no impact on divorce rates among the partially compensated by faster reemployment (about upper tercile. 3 weeks,4.3% in unemployment duration) and higher Hypotheses 3a-c considered gender-specific ef- earnings (about CHF 2,880, +11.3%, see Table 2A fects. We do not find support for the gendered ex- (appendix)). pectations of any of these hypotheses (Figure 4, middle panel). In the fourth year after unemployment, Heterogenous effects of the reform the reform had a statistically significant impact on both men’s and women’s divorce rates. While absolute In addition to main effects, we hypothesized dif- effects for men (3.7 percentage points) are somewhat ferential effects across subgroups. Figure 4 presents stronger than for women (2.8 percentage points), they the results from the stratified analyses by terciles of are more similar when expressed relative to coun- household income, gender and gender combined terfactual levels of divorce (32% for men, 28% for with relative income contribution. women). Confirming Hypothesis 2a, we find a greater Considering the results for gender and relative increase in divorce due to the reform for couples in income contribution simultaneously suggests that the bottom income tercile (Figure 4, upper panel), stronger effects for unemployed men are entirely due with reform effects, and the difference in reform to their greater contribution to household income effects by income, significant only in the fourth year (Figure 4, bottom panel). The reform impacted 12 Journal of European Social Policy 0(0) Conclusion Although there is literature showing unemployment insurance generosity impacts health and that unem- ployment causes divorce (e.g. Di Nallo et al., 2022; Kuka, 2020), there is only one study examining un- employment insurance and divorce (Lindo et al., 2020). Further, from the social policy literature, we know that social programme generosity is associated with family stability, but these studies have not ex- amined how unemployment insurance, the most im- portant social safety net for the working age population, affects divorce. Using full-population administrative data and a policy change that re- duced maximum benefit duration in Switzerland, in this study we provide new evidence for how unem- ployment insurance generosity impacts divorce. We found that the reform, reducing entitlement by 6 months, was associated with a 2.8 percentage point increase in the share of couples who divorce, which is a 25% relative increase. As could be expected from the lag between marital conflict, household separa- tion and formal divorce, we found statistically sig- nificant effects only 4 years after unemployment start. The reform’s effect on divorce was mediated by income and employment effects, with the reform leading to a 23% drop in total benefit income, a small reduction in unemployment duration (4.3%) and an increase in earned income (+11.3%) for those un- Figure 4. Difference-in-differences estimates of the effect employed for more than nine months. of the reduction of unemployment benefit duration on The increase in divorce was largely concentrated cumulative divorce after unemployment start by among poor households, with upper income household income, gender and gender combined with households unaffected. Unlike Lindo et al. (2020), relative income contribution, 95% confidence intervals. we also found substantial effects of benefit gener- osity on divorce rates of unemployed women. divorce only among breadwinners with no statisti- Slightly higher average effects for men are explained cally significant effects for unemployed individuals by men’s higher relative contribution to household contributing less than half of the couples’ income income before job loss. Among primary earners, the before unemployment. It increased divorce among reduction in benefits had a stronger impact on di- unemployed female breadwinners in the third year vorce for unemployed women. after unemployment start by + 8.9 percentage points These results largely lend support for a gender- which is a 117% increase; in the fourth year, it in- neutral version of the family stress model in which creased divorce by + 9.2 percentage points, a 78% the stress caused by financial difficulties and in- increase. In contrast, for male breadwinners the re- creased pressure to find a job leads to marital conflict form’s effect is only statistically significant in the and divorce. Taking the viewpoint of the unem- fourth year, increasing divorce by + 5.2 percentage ployed spouse, these findings could also be related to points, or 40%. economic dependence: due to benefit loss, the spouse Kessler et al. 13 can depend less on the financial support of their be generalizable to the overall population receiving unemployed partner, reducing the attractiveness of unemployment benefits, as most unemployment this marriage. spells are short or might not apply to different In contradiction to interpretations put forward in changes in unemployment insurance, like a reduction many studies on the effect of income shocks on in the replacement rate. More knowledge is needed divorce (Bertrand et al., 2015; Goñalons-Pons and on how other changes to unemployment benefits Gangl, 2021; Killewald, 2016), our results do not impact divorce (Lindo et al., 2020). Also, it might support the notion that the male breadwinner norm seem that the Swiss context might be very specific (which is still dominant in Switzerland) alters the and not generalizable to other countries. That said, interpretation of income loss. Rather, the high effects given high savings rates and wealth, as well as among (female and male) primary earners suggest generous social assistance, it seems likely that that stress is greater when the income loss is more Switzerland is a ‘least-likely’ case, that is, if un- financially significant for a couple. It is possible employment insurance is key for marital stability in earlier studies finding stronger effects for male in- Switzerland, it is likely even more so in other come loss did not sufficiently account for the countries. Still, additional studies from other coun- household’s dependency on lost income. In fact, our tries are necessary to confirm the results. results combining gender and relative income con- Assuming these estimates reflect the causal effect tribution suggest that women’s income loss is more of shortened maximum benefit duration on divorce, important than men’s. our findings have important policy implications. Results cannot, however, conclusively reject the When deciding on shorter benefits, policymakers cost/independence hypotheses. It is possible that un- must not only consider the immediate savings from happy couples or unemployed individuals who were fewer benefits being paid out and small positive re- considering divorce might have postponed it in the face employment effects, but also potential impacts on of reduced benefits. Since our data did not allow us to other outcomes like divorce. Social insurance gen- identify dissatisfied couples (as compared to Goñalons- erosity has a broader impact than is often considered Pons and Calnitsky, 2021), we can only conclude that when policymakers cut programmes. this was not the dominant mechanism in our overall sample, nor among the subgroups we explored. Acknowledgements The study also has several limitations. In principle, our We thank the Swiss National Science Foundation for results could reflect differences in divorce trends between funding for this project (grant nr. 176371), Ursina Kuhn, as more (treated) and less (controls) disadvantaged groups well as workshop participants of the 18th Meeting of the that existed independently of the reform. Or they could ‘European Network for the Sociological and Demographic express adverse selection, with more able, and deter- Study of Divorce’ at University of Cologne and of the mined (and less divorce-prone) individuals self-selecting Ingrid Expert Workshop ‘Experimental designs in social into the control group. However, our robustness checks policy research: strengths, weaknesses, opportunities, and reject these assumptions in favour of a causal interpre- threats’ at the University of Stockholm for comments on tation of our findings: the higher divorce rate among prior versions of this manuscript. treated versus controls emerges just after the reform, which could not be predicted looking at how di- Declaration of Conflicting Interests vorce evolved among the two groups before the reform. Also, we find no evidence that individuals The author(s) declared no potential conflicts of interest strategically adapted to the new eligibility rules with respect to the research, authorship, and/or publication after these became known to the public. of this article. In addition, our results might have limited gen- eralizability. We only studied long-term unemployed Funding individuals and only a single dimension of benefit The author(s) disclosed receipt of the following financial generosity, that is, benefit duration. Results might not support for the research, authorship, and/or publication of 14 Journal of European Social Policy 0(0) this article: This work was supported by the Schweizerischer do not see this data limitation as a threat to our study Nationalfonds zur Förderung der Wissenschaftlichen For- design since it affected all our study groups (see schung (176371). Study design) alike. 7. We excluded the unemployed who had paid 24 months of contributions to restrict the control Data availability statement sample to unemployed with disrupted employment Due to Swiss data protection laws, authors are not al- histories, that is, to select controls that are more lowed to share research data directly. Data can, however, comparable to the treated, but were still not af- be requested from the Swiss Federal Statistical Office fected by the reform. (https://www.bfs.admin.ch/bfs/en/home/services/data- 8. Due to the design of the reform (reducing benefits linkages/for-third-parties.html). Code for data prepa- from 1.5 to one year), only those who were at the ration and analysis is available from authors upon least approaching one year of benefits were affected request. by it. We assumed that anticipation of benefit ex- haustion after 12 months already affects individuals ORCID iD after 9 months. We therefore restricted the sample to Dorian Kessler  https://orcid.org/0000-0003-0495-0858 those with at least 9 months of unemployment duration. Supplemental Material 9. There were different rules to benefit eligibility before Supplemental material for this article is available online. July 2003. 10. Information on both divorce filing and the date the divorce was granted was last available in 2008 as the Notes Federal Statistical Office stopped collecting this var- 1. Workers are exempted from contribution requirements iable to reduce the administrative burden of the courts. if they recently finished education, gave birth to a 11. Overall conclusions remain unaffected using quartiles child, were sick, had a divorce or separation, or fin- versus terciles. ished a prison sentence. 12. Alternative estimates using logistic regression (see 2. Figure refers to the level in 2021. Figure 2A), illustrating effects as average marginal 3. The reform was motivated by budget shortfalls fol- effects have similar results. 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