Working Papers
What happens to earnings upon marriage? Linking administrative and survey data from Germany, we show that there is a marriage earnings gap. Even after accounting for the child penalty, women’s earnings drop by 20% after marriage. We show that the marriage earnings gap results from both the extensive margin (women stop working) and the intensive margin (women work fewer hours), but not from a decrease in hourly wages. Labor supply disincentives from joint taxation can explain about one third of the marriage earnings gap, while we find no effect for labor supply incentives from changes in divorce law. Leveraging variation in norms created by the German separation, we find that gender norms are another important driver behind the marriage earnings gap.
Default setting has been shown to be a powerful tool to enhance enrollment in pension programs, which often involve multidimensional choices and complex choice menus. We document that the effect is less pronounced when the choice menu is simple and it is easy to opt out. We study low-income employees who face a binary choice: to enroll or not to enroll in the German public pension insurance. Using administrative data, we show that program participation increases by 23 percentage points after the introduction of automatic enrollment. However, the majority of individuals actively opt out. We document that behind this average effect, there is substantial heterogeneity across different groups of individuals. We use linked survey data to further explore this heterogeneity and show that the default is particularly powerful for individuals with low financial literacy.
Work in Progress
Lost in Deduction: Taxpayers' Mistakes when Itemizing
Taxpayers can reduce their tax liability by itemizing deductions and claiming more than the standard deduction they are automatically entitled to. I show that taxpayers also itemize when this does not reduce their tax liability. This is a mistake because itemizing has costs but no benefits and is thus strictly dominated by not itemizing. Using German administrative income tax data, I document that 57 percent of tax filers make this mistake at least once. They itemize even when the sum does not exceed the standard deduction, or when they already face a zero tax liability before itemizing, or both.
On the effects of the child-age dependent reform of alimony in Germany
with David Koll
Publications
Optional (Non-)Filing and Effective Taxation, with Tobias Hauck, Journal of Public Economics 238 (October), 2024, 105187
Media coverage (German): Handelsblatt (12/2021), Die Presse (op-ed 8/2024)
Policy report (German): Automatische Einkommensteuererstattungen zur Entlastung niedriger Einkommen. Wirtschaftsdienst 101, 956–959 (2021).
Rising Income Tax Complexity, with Youssef Benzarti, National Tax Journal 77(1), 2024, p. 143–73
Publisher's link, NBER Working Paper 31944
Media coverage (German): Frankfurter Allgemeine Zeitung (12/2023, op-ed 4/2024), Handelsblatt (4/2024)