Strukturwandel und Produktivität

Die Abteilung Strukturwandel und Produktivität untersucht Prozesse strukturellen Wandels, die beispielsweise durch die Dekarbonisierung der Wirtschaft oder technologische Neuerungen erzeugt werden können. Struktureller Wandel beeinflusst maßgeblich die langfristige Entwicklung einer Volkswirtschaft. Er führt zu Aufschwung und Niedergang von Regionen, Wirtschaftszweigen und Betrieben und hat direkte Konsequenzen für den Arbeitsmarkt und die Produktivität der Unternehmen. Wir erforschen die Auswirkungen strukturellen Wandels empirisch mit Hilfe mikroökonometrischer Verfahren. Die Abteilung betreibt Insolvenzforschung und koordiniert das Competitiveness Research Network (CompNet), ein Zentrum für Forschung und Politikberatung rund um die Themen Wettbewerbsfähigkeit und Produktivität.

Im Fokus unserer Arbeit stehen Produktivität, Unternehmensdynamik und Arbeitsmarktergebnisse wie zum Beispiel Beschäftigung und Lohnniveau. Ein besonderes Augenmerk liegt auf der Rolle von Marktmacht auf Produkt- und Arbeitsmärkten. Die Abteilung erforscht gemeinsam mit dem Gewinner des Max-Planck-Humboldt-Forschungspreises von 2019, Professor Ufuk Akcigit (Chicago), die Ursachen der ökonomischen Unterschiede zwischen Ost- und Westdeutschland. Diese wissenschaftlich und wirtschaftspolitisch relevanten Forschungsfragen werden durch die Abteilung im Forschungscluster "Institutionen und soziale Normen" sowie im Forschungscluster "Produktivität und Innovationen" analysiert.

Ihr Kontakt

Professor Dr. Steffen Müller
Professor Dr. Steffen Müller
- Abteilung Strukturwandel und Produktivität
Nachricht senden +49 345 7753-708 Persönliche Seite LinkedIn Profil

Referierte Publikationen

Ausgewählte Publikationen

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Industry Mix, Local Labor Markets, and the Incidence of Trade Shocks

Steffen Müller Jens Stegmaier Moises Yi

in: Journal of Labor Economics, Nr. 3, 2024

Abstract

<p>We analyze how skill transferability and the local industry mix affect the adjustment costs of workers hit by a trade shock. Using German administrative data and novel measures of economic distance we construct an index of labor market absorptiveness that captures the degree to which workers from a particular industry are able to reallocate into other jobs. Among manufacturing workers, we find that the earnings loss associated with increased import exposure is much higher for those who live in the least absorptive regions. We conclude that the local industry composition plays an important role in the adjustment processes of workers.</p>

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Can Mentoring Alleviate Family Disadvantage in Adolescence? A Field Experiment to Improve Labor-Market Prospects

Sven Resnjanskij Jens Ruhose Simon Wiederhold Ludger Woessmann Katharina Wedel

in: Journal of Political Economy, Nr. 3, 2024

Abstract

<p>We study a mentoring program that aims to improve the labor-market prospects of school-attending adolescents from disadvantaged families by offering them a university-student mentor. Our RCT investigates program effectiveness on three outcome dimensions that are highly predictive of later labor-market success: math grades, patience/social skills, and labor-market orientation. For low-SES adolescents, the mentoring increases a combined index of the outcomes by over half a standard deviation after one year, with significant increases in each dimension. Part of the treatment effect is mediated by establishing mentors as attachment figures who provide guidance for the future. Effects on grades and labor-market orientation, but not on patience/social skills, persist three years after program start. By that time, the mentoring also improves early realizations of school-to-work transitions for low-SES adolescents. The mentoring is not effective for higher-SES adolescents. The results show that substituting lacking family support by other adults can help disadvantaged children at adolescent age.</p>

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European Firm Concentration and Aggregate Productivity

Tommaso Bighelli Filippo di Mauro Marc Melitz Matthias Mertens

in: Journal of the European Economic Association, Nr. 2, 2023

Abstract

This paper derives a European Herfindahl–Hirschman concentration index from 15 micro-aggregated country datasets. In the last decade, European concentration rose due to a reallocation of economic activity toward large and concentrated industries. Over the same period, productivity gains from an increasing allocative efficiency of the European market accounted for 50% of European productivity growth while markups stayed constant. Using country-industry variation, we show that changes in concentration are positively associated with changes in productivity and allocative efficiency. This holds across most sectors and countries and supports the notion that rising concentration in Europe reflects a more efficient market environment rather than weak competition and rising market power.

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Immigration and Entrepreneurship in the United States

Pierre Azoulay Benjamin Jones J. Daniel Kim Javier Miranda

in: American Economic Review: Insights, Nr. 1, 2022

Abstract

Immigration can expand labor supply and create greater competition for native-born workers. But immigrants may also start new firms, expanding labor demand. This paper uses U.S. administrative data and other data resources to study the role of immigrants in entrepreneurship. We ask how often immigrants start companies, how many jobs these firms create, and how these firms compare with those founded by U.S.-born individuals. A simple model provides a measurement framework for addressing the dual roles of immigrants as founders and workers. The findings suggest that immigrants act more as &quot;job creators&quot; than &quot;job takers&quot; and that non-U.S. born founders play outsized roles in U.S. high-growth entrepreneurship

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The Place-based Effects of Police Stations on Crime: Evidence from Station Closures

Sebastian Blesse André Diegmann

in: Journal of Public Economics, March 2022

Abstract

Many countries consolidate their police forces by closing down local police stations. Police stations represent an important and visible aspect of the organization of police forces. We provide novel evidence on the effect of centralizing police offices through the closure of local police stations on crime outcomes. Combining matching with a difference-in-differences specification, we find an increase in reported car theft and burglary in residential properties. Our results are consistent with a negative shift in perceived detection risks and are driven by heterogeneous station characteristics. We can rule out alternative explanations such as incapacitation, crime displacement, and changes in police employment or strategies at the regional level. We argue that criminals are less deterred due to a lower visibility of the local police.

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Arbeitspapiere

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The Distribution of National Income in Germany, 1992-2019

Stefan Bach Charlotte Bartels Theresa Neef

in: IWH Discussion Papers, Nr. 25, 2024

Abstract

<p>This paper analyzes the distribution and composition of pre-tax national income in Germany since 1992, combining personal income tax returns, household survey data, and national accounts. Inequality rose from the 1990s to the late 2000s due to falling labor incomes among the bottom 50% and rising incomes in the top 10%. This trend reversed after 2007 as labor incomes across the bottom 90% increased. The top 1% income share, dominated by business income, remained relatively stable between 1992 and 2019. A large share of Germany’s top 1% earners are non-corporate business owners in labor-intensive professions. At least half of the business owners in P99-99.9 and a quarter in the top 0.1% operate firms in professional services – a pattern mirroring the United States. From 1992 to 2019, Germany’s top 0.1% income concentration exceeded France’s and matched U.S. levels until the late 2000s.</p>

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From Labor to Intermediates: Firm Growth, Input Substitution, and Monopsony

Matthias Mertens Benjamin Schoefer

in: IWH Discussion Papers, Nr. 24, 2024

Abstract

<p>We document and dissect a new stylized fact about firm growth: the shift from labor to intermediate inputs. This shift occurs in input quantities, cost and output shares, and output elasticities. We establish this fact using German firm-level data and replicate it in administrative firm data from 11 additional countries. We also document these patterns in micro-aggregated industry data for 20 European countries (and, with respect to industry cost shares, for the US). We rationalize this novel regularity within a parsimonious model featuring (i) an elasticity of substitution between intermediates and labor that exceeds unity, and (ii) an increasing shadow price of labor relative to intermediates, due to monopsony power over labor or labor adjustment costs. The shift from labor to intermediates accounts for one half to one third of the decline in the labor share in growing firms (the remainder is due to wage markdowns and markups) and rationalizes most of the labor share decline in growing industries.</p>

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From Shares to Machines: How Common Ownership Drives Automation

Joseph Emmens Dennis Hutschenreiter Stefano Manfredonia Felix Noth Tommaso Santini

in: IWH Discussion Papers, Nr. 23, 2024

Abstract

<p>Does increasing common ownership influence firms’ automation strategies? We develop and empirically test a theory indicating that institutional investors’ common ownership drives firms that employ workers in the same local labor markets to boost automation-related innovation. First, we present a model integrating task-based production and common ownership, demonstrating that greater ownership overlap drives firms to internalize the impact of their automation decisions on the wage bills of local labor market competitors, leading to more automation and reduced employment. Second, we empirically validate the model’s predictions. Based on patent texts, the geographic distribution of firms’ labor forces at the establishment level, and exogenous increases in common ownership due to institutional investor mergers, we analyze the effects of rising common ownership on automation innovation within and across labor markets. Our findings reveal that firms experiencing a positive shock to common ownership with labor market rivals exhibit increased automation and decreased employment growth. Conversely, similar ownership shocks do not affect automation innovation if firms do not share local labor markets.</p>

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Do Politicians Affect Firm Outcomes? Evidence from Connections to the German Federal Parliament

André Diegmann Laura Pohlan Andrea Weber

in: IWH Discussion Papers, Nr. 15, 2024

Abstract

We study how connections to German federal parliamentarians affect firm dynamics by constructing a novel dataset to measure connections between politicians and the universe of firms. To identify the causal effect of access to political power, we exploit (i) new appointments to the company leadership team and (ii) discontinuities around the marginal seat of party election lists. Our results reveal that connections lead to reductions in firm exits, gradual increases in employment growth without improvements in productivity. The economic effects are mediated by better credit ratings while access to subsidies or procurement contracts are documented to be of lower importance.

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Early Child Care, Maternal Labor Supply, and Gender Equality: A Randomized Controlled Trial?

Henning Hermes Marina Krauß Philipp Lergetporer Frauke Peter Simon Wiederhold

in: IWH Discussion Papers, Nr. 14, 2024

Abstract

We provide experimental evidence that enabling access to universal early child care increases maternal labor supply and promotes gender equality among families with lower socioeconomic status (SES). Our intervention offers information and customized help with child care applications, leading to a boost in child care enrollment among lower-SES families. 18 months after the intervention, we find substantial increases in maternal full-time employment (+160%), maternal earnings (+22%), and household income (+10%). Intriguingly, the positive employment effects are not only driven by extended hours at child care centers, but also by an increase in care hours by fathers. Gender equality also benefits more broadly from better access to child care: The treatment improves a gender equality index that combines information on intra-household division of working hours, care hours, and earnings by 40% of a standard deviation, with significant increases in each dimension. For higher-SES families, we consistently observe negligible, insignificant treatment effects.

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