Ökonomische Unterschiede zwischen Ost- und Westdeutschland
Die Gruppe untersucht mit innovativen Methoden, warum die Wirtschaft in Ostdeutschland bis heute hinter der westdeutschen zurückbleibt und welche Rolle die Treuhandanstalt dabei spielt.
In ihrem Hauptprojekt untersucht die Gruppe den Prozess der Privatisierung der DDR-Wirtschaft durch die Treuhandanstalt. Inwiefern spielte die Qualifizierung der ausgewählten Managerinnen und Manager und deren Netzwerk zu anderen Entscheidern eine Rolle? In Form eines Benchmark-Modells soll auf Basis von Mikrodaten (Firmen, Manager, Patente, Ideen) herausgefunden werden, wie die ostdeutschen Betriebe heute daständen, wenn sie ausschließlich von talentierten Unternehmerpersönlichkeiten übernommen worden wären. Das zweite Projekt analysiert, warum besonders innovative Firmen seltener in Ost- als in Westdeutschland entstehen und welche Rolle Migrantinnen und Migranten für das Wirtschaftswachstum und die Wissensproduktion in Deutschland spielen. Das dritte Projekt verwendet CompNet-Daten, um nach Gründen für die schwindende Produktivitätsdynamik in Europa zu suchen.
ForschungsclusterGesamtwirtschaftliche Dynamik und Stabilität
Innovation, Reallocation, and Growth
in: American Economic Review, Nr. 11, 2018
We build a model of firm-level innovation, productivity growth, and reallocation featuring endogenous entry and exit. A new and central economic force is the selection between high- and low-type firms, which differ in terms of their innovative capacity. We estimate the parameters of the model using US Census microdata on firm-level output, R&D, and patenting. The model provides a good fit to the dynamics of firm entry and exit, output, and R&D. Taxing the continued operation of incumbents can lead to sizable gains (of the order of 1.4 percent improvement in welfare) by encouraging exit of less productive firms and freeing up skilled labor to be used for R&D by high-type incumbents. Subsidies to the R&D of incumbents do not achieve this objective because they encourage the survival and expansion of low-type firms.
Growth through Heterogeneous Innovations
in: Journal of Political Economy, Nr. 4, 2018
We build a tractable growth model in which multiproduct incumbents invest in internal innovations to improve their existing products, while new entrants and incumbents invest in external innovations to acquire new product lines. External and internal innovations generate heterogeneous innovation qualities, and firm size affects innovation incentives. We analyze how different types of innovation contribute to economic growth and the role of the firm size distribution. Our model aligns with many observed empirical regularities, and we quantify our framework with Census Bureau and patent data for US firms. Internal innovation scales moderately faster with firm size than external innovation.
On the Returns to Invention within Firms: Evidence from Finland
in: American Economic Association Papers and Proceedings, 2018
In this paper we merge individual income data, firm-level data, patenting data, and IQ data in Finland over the period 1988–2012 to analyze the returns to invention for inventors and their coworkers or stakeholders within the same firm. We find that: (i) inventors collect only 8 percent of the total private return from invention; (ii) entrepreneurs get over 44 percent of the total gains; (iii) bluecollar workers get about 26 percent of the gains and the rest goes to white-collar workers. Moreover, entrepreneurs start with significant negative returns prior to the patent application, but their returns subsequently become highly positive.
Economic Growth: The Past, the Present, and the Future
in: Journal of Political Economy, Nr. 6, 2017
“Is there some action a government of India could take that would lead the Indian economy to grow like Indonesia’s or Egypt’s? If so, what, exactly? If not, what is it about the ‘nature of India’ that makes it so? The consequences for human welfare involved in questions like these are simply staggering: Once one starts to think about them, it is hard to think about anything else. (Lucas 1988, 5)” These words by the Nobel laureate Chicago economist Robert Lucas Jr. summarize why so many great scholars found it hard to “think about anything else” and spent their careers trying to understand the process of economic growth. Economies are complex systems resulting from the actions of many actors. This complexity makes it challenging, but also infinitely interesting, to understand the determinants of economic growth. What are the roles of human capital, fertility, ideas, basic science, and public policy for growth? These are just some of the important questions that were posed by many highly influential studies featured in the issues of the Journal of Political Economy over the years. Indeed, this journal has been the platform to diffuse many of the brilliant ideas and start important debates in the field of economic growth. In this short paper, my goal is to revisit some of those seminal papers, briefly describe some of the more recent contributions, and end with some thoughts about the future direction of the field. The reader should note in advance that the list of work covered here is by no means exhaustive and mostly targets work that has been featured in issues of the JPE.
Imputation Rules for the Implementation of the Pre-unification Education Variable in the BASiD Data Set
in: Journal for Labour Market Research, 2017
Using combined data from the German Pension Insurance and the Federal Employment Agency (BASiD), this study proposes different procedures for imputing the pre-unification education variable in the BASiD data. To do so, we exploit information on education-related periods that are creditable for the Pension Insurance. Combining these periods with information on the educational system in the former GDR, we propose three different imputation procedures, which we validate using external GDR census data for selected age groups. A common result from all procedures is that they tend to underpredict (overpredict) the share of high-skilled (low-skilled) for the oldest age groups. Comparing our imputed education variable with information on educational attainment from the Integrated Employment Biographies (IEB) reveals that the best match is obtained for the vocational training degree. Although regressions show that misclassification with respect to IEB information is clearly related to observables, we do not find any systematic pattern across skill groups.
Police Reorganization and Crime: Evidence from Police Station Closures
in: German Council of Economic Experts Working Paper, Nr. 7, 2019
Does the administrative organization of police affect crime? In answering this question, we focus on the reorganization of local police agencies. Specifically, we study the effects police force reallocation via station closures has on local crime. We do this by exploiting a quasi-experiment where a reform substantially reduced the number of police stations. Combining a matching strategy with an event-study design, we find no effects on total theft. Police station closures, however, open up tempting opportunities for criminals in car theft and burglary in residential properties. We can rule out that our effects arise from incapacitation, crime displacement, or changes in employment of local police forces. Our results suggest that criminals are less deterred after police station closures and use the opportunity to steal more costly goods.
Do Digital Information Technologies Help Unemployed Job Seekers Find a Job? Evidence from the Broadband Internet Expansion in Germany
in: IFAU Working Paper 2018:21, 2018
This paper studies effects of the introduction of a new digital mass medium on reemployment of unemployed job seekers. We combine data on high-speed (broadband) internet availability at the local level with German individual register data. We address endogeneity by exploiting technological peculiarities that affected the roll-out of high-speed internet. The results show that high-speed internet improves reemployment rates after the first months in unemployment. This is confirmed by complementary analyses with individual survey data suggesting that internet access increases online job search and the number of job interviews after a few months in unemployment.