Monopsonistic Labour Markets
Hartmut Egger, Boris Hirsch
German Economic Review,
Vol. 26 (4),
2025
Abstract
The three articles in this special issue on “Monopsonistic Labour Markets” provide novel insights on how to model the reasons for employers’ monopsony power, how to measure it, and how much of it materialises in lower wages. We are confident that the studies published in this issue will be of high interest to specialists and a broader audience of economists alike. They definitely deserve a wide readership, and our not unwarranted hope is that they will provide new impulses to those partaking in the monopsony literature.
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Time To Close the Socioeconomic Gap in Access to Childcare
Henning Hermes, Philipp Lergetporer, Frauke Peter, Simon Wiederhold
Nature Human Behaviour,
Vol. 10 (7),
2026
Abstract
Socioeconomic inequalities shape who accesses early childcare, even in countries that claim universal provision. This entrenched inequality limits child development, women’s employment and gender equality — but governments have clear tools to close the gap.
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Inflation Concerns and Green Product Consumption: Evidence from a Nationwide Survey and a Framed Field Experiment
Sabrina Jeworrek, Lena Tonzer
Abstract
Promoting green product consumption is one important element in building a sustainable society. Yet green products are usually more costly. In times of high inflation, not only budget constraints but also the fear that prices will continue to rise might dampen green product consumption and, hence, limit the effectiveness of exerted efforts to promote sustainable behaviors. To test this suggestion, we conducted a Germany-wide survey with almost 1,200 respondents, followed by a framed field experiment (N=500) to confirm causality. In the survey, respondents’ stated “green” purchasing behavior is, as to be expected, positively correlated with concerns about climate change. It is also negatively correlated with concerns about future inflation and energy costs, but after controlling for observable characteristics such as income and educational level only the correlation with concerns about future prices remains significant. This result is driven by individuals with below-median environmental attitude. In the framed field experiment, we use the priming method to manipulate the saliency of inflation concerns. Whereas sizably relaxing the budget constraint (i.e., by 50 percent) has no impact on the share of organic products in participants’ baskets, the priming significantly decreases the share of organic products for individuals with below-median environmental attitude, similar to the survey data.
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Inflation Concerns and Green Product Consumption: Evidence From a Nationwide Survey and a Framed Field Experiment
Sabrina Jeworrek, Lena Tonzer
Journal of Economic Behavior and Organization,
Vol. 248 (August),
2026
Abstract
Promoting green (usually more costly) product consumption is one essential element in building a sustainable society. In times of high inflation, not only budget constraints but also the fear that prices will continue to rise might limit the effectiveness of exerted efforts to promote sustainable behaviors. To test this suggestion, we conducted a Germany-wide survey with almost 1200 respondents, followed by a framed field experiment to confirm causality. Our proxy for green consumption is organic food purchases. Survey respondents’ stated organic purchasing behavior is positively correlated with concerns about climate change but negatively correlated with concerns about inflation. The latter result is driven by individuals with a below-median environmental attitude. In the framed field experiment, we use the priming method to manipulate the saliency of inflation concerns. Whereas sizably relaxing the budget constraint has no impact on the share of organic products in participants’ baskets, the priming significantly decreases the share of organic products for individuals with below-median environmental attitude. Using the same inflation priming in a subsequent survey experiment with around 1800 respondents, we find that high inflationary environments affect both the perception of organic being luxury products and the social norm of buying organic. Both effects are more pronounced for individuals with below-median environmental attitude and, hence, they are the likely mechanisms driving the negative effects on organic product consumption.
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05.08.2026 • 21/2026
Studie belegt Milliardenlücke im Wahlprogramm der AfD Sachsen-Anhalt
Im Haushalt einer möglichen AfD-Alleinregierung in Sachsen-Anhalt fehlten mindestens 2,2 Milliarden Euro. Das zeigt eine Analyse des Leibniz-Instituts für Wirtschaftsforschung Halle (IWH). Die Berechnungen basieren auf amtlichen Daten und dem Wahlprogramm der Partei.
Reint E. Gropp
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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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Klimaziele und Wachstum vereinbaren: Bedeutung der Energieproduktivität
Oliver Holtemöller, Christoph Schult
Wirtschaftsdienst,
Vol. 106 (5),
2026
Abstract
Die Energieproduktivität in Deutschland ist in den vergangenen Jahren gestiegen. Inwiefern lässt sich daraus auf eine Transformation des Energiesystems und der Produktion schließen? Der Beitrag zeigt, dass der Anstieg der Energieproduktivität nur begrenzt auf Effizienzfortschritte innerhalb von Sektoren zurückzuführen ist, sondern auch durch Strukturwandel und den Rückgang energieintensiver Produktion getrieben wird. Eine Projektion des Endenergieverbrauchs bis 2030 deutet darauf hin, dass die energiepolitischen Zielwerte bei schwachem Wirtschaftswachstum erreichbar sind. Bei höherem Wachstum würden sie jedoch verfehlt. Daraus ergibt sich ein Zielkonflikt zwischen Energieverbrauchsreduktion und wirtschaftlicher Dynamik; es braucht zusätzliche Effizienzgewinne oder technologische Innovationen um ihn aufzulösen.
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Current PhD Students
Current PhD Students Afroza Alam (Supervisor: Reint Gropp ) Annika Backes (Supervisors: Simon Wiederhold , Christoph Wunder ) Nic Dorsch (Supervisor: Reint Gropp) Arsène Buzima…
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Regulating Zombie Mortgages
Jonathan Lee, Duc Duy Nguyen, Huyen Nguyen
Review of Finance,
forthcoming
Abstract
Using the adoption of Zombie Property Laws (ZL) across several US states, we show that requiring lenders to maintain properties in the foreclosure process affects mortgage lending decisions and standards. Difference-in-differences estimations using a state border design show that ZL incentivizes lenders to screen mortgage applications more carefully: they deny more applications and impose higher interest rates on originated loans, especially risky loans. In turn, these loans exhibit higher ex post performance. ZL also affects lender behavior after borrowers become distressed, causing them to strategically keep delinquent mortgages alive. Our findings inform the debate on policy responses to foreclosure crises.
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