Understanding Gender Match Effects in Higher Education: The Role of Class Size
Stephan Maurer, Guido Schwerdt, Simon Wiederhold
Journal of Human Resources,
forthcoming
Abstract
It is widely believed that female students perform better when taught by female professors. However, little is known about the mechanisms explaining these gender match effects. Using administrative records from a German public university, which cover all programs and courses between 2006 and 2018, we show that gender match effects are sizable in smaller classes, but are absent in larger classes. These results suggest that direct and frequent interactions between students and professors are crucial for gender match effects to emerge. In contrast, the mere fact that one’s professor is female is not sufficient to increase performance of female students.
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03.09.2026 • 25/2026
Economic Outlook: German economy on a recovery path – Tailwinds from the global economy and fiscal policy
An increase in foreign demand has put the German economy on a recovery path in the first half of the year, despite higher energy prices. In the coming quarters, rising public investment is expected to support economic activity. According to the autumn forecast of the Halle Institute for Economic Research (IWH), gross domestic product (GDP) is projected to grow by 1.4% this year and by 0.8% in 2027. Economic recovery in eastern Germany is expected to be somewhat weaker. In June, the IWH economists had predicted growth of 0.9% for both this and the next year.
Oliver Holtemöller
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Ist das AfD-Wahlprogramm für Sachsen-Anhalt finanzierbar? — Kosten und Gegenfinanzierung vor der Landtagswahl am 6. September 2026
Nic Dorsch, Reint E. Gropp, Alexander Reifschneider
IWH Policy Notes,
No. 2,
2026
Abstract
Das Wahlprogramm der AfD Sachsen-Anhalt verspricht umfangreiche neue Leistungen, den Verzicht auf neue Schulden und niedrigere Steuern zugleich. Diese Policy Note beziffert, wie weit Kosten und Gegenfinanzierung auseinanderliegen. Von 136 kostenwirksamen Maßnahmen lassen sich 28 mit amtlichen Quellen belegen. Diese kosten rund 1,6 Mrd. Euro pro Jahr. Da das AfD-Programm neue Schulden ausschließt, kommen die im Landeshaushalt bereits eingeplanten 877 Mio. Euro jährlicher Neuverschuldung hinzu. Der bezifferbare Finanzierungsbedarf beträgt damit rund 2,5 Mrd. Euro pro Jahr. Dem stehen bei großzügiger Auslegung rund 243 Mio. Euro belegbare Einsparungen gegenüber. Von jedem Euro sind damit nicht einmal zehn Cent gedeckt. Es bleibt eine Lücke von mindestens 2,2 Mrd. Euro pro Jahr. Das entspricht rund einem Viertel der Steuereinnahmen des Landes, umgerechnet gut 1 000 Euro je Einwohner und Jahr. Da das Programm auch Steuererhöhungen ausschließt, ist unklar, wie die AfD diese Lücke schließen will.
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Patents, Firm Rents, and Worker Compensation: Causal Evidence from Quasi-random Patent Allocation
Afroza Alam, André Diegmann
IWH Discussion Papers,
No. 6,
2026
Abstract
This paper provides new causal evidence on how patent allowances affect firms and their employees based on quasi-random assignment of patent applications to examiners. Exploiting employer-employee records with newly linked German firm data and web-scraped patent documents, we show that patent-induced shocks reduce firm exit, improve productivity, and increase wages, with rent-sharing elasticities between 0.10 and 0.21. Wage gains are broadly observed across occupational tasks, with high heterogeneity: managers benefit disproportionately in publicly traded firms, whereas broader wage increases accrue to workers in non-traded firms. Our findings highlight the role of institutional features and firm organization in shaping how rents are shared.
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12.03.2026 • 8/2026
Oil price shock threatens recovery in Germany
Globally rising energy prices in the wake of the new Gulf War are clouding the outlook for the German economy. Nevertheless, increased public expenditure is expected to support economic activity both this year and next. According to the spring forecast of the Halle Institute for Economic Research (IWH), output is projected to grow by 0.7% in 2026 and by 1.0% in 2027. We expect similar rates of expansion for East Germany. In December, the IWH economists had predicted growth of 1.0% for both 2026 and 2027.
Oliver Holtemöller
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IWH Bankruptcy Research
IWH Bankruptcy Research The Bankruptcy Research Unit of the Halle Institute for Economic Research (IWH) presents the Institute’s research on the topics of corporate bankruptcy,…
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Subscribe to the IWH Newsletter “Wirtschaft im Wandel” The IWH newsletter "Wirtschaft im Wandel" quaterly notifies subscribers via e-mail of research results, new publications,…
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Macroeconomic Reports
Macroeconomic Reports Local and global: IWH regularly provides current economic data – be it about the state of the East German economy, the macroeconomic development in Germany…
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Economic Outlook
IWH Autumn Forecast 2026 German Economy on a Recovery Path – Tailwinds from the Global Economy and Fiscal Policy September 3, 2026 An increase in foreign demand has put the German…
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Halle Institute for Economic Research
Rents in Europe’s cities are 23% higher on average than in rural areas The latest European Real Estate Index (EREI) by the Halle Institute for Economic Research (IWH) shows that…
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