Research interests

• Economics of entrepreneurship 
• business start-up decisions
• firm design
• consequences of entrepreneurship
• Economics of innovation and technological change 
• adoption and diffusion of innovations and new technologies
• innovation and firm performance 
• Behavioral economics 
• perceptions, judgment and decision making in uncertain or risky situations
• non-monetary utility 
• biological perdispositions to economic behavior

Work in progress

• "A genome-wide association study of educational attainment", with J. Beauchamp, D. Cesarini, M. van der Loos, P. Groenen, J. Fowler, N. Rosenquist, R. Thurik and N. Christakis, SSRN discussion paper 1655023
• "Entrepreneurship: A genetically complex trait?", with P.J.F. Groenen, A. Hofman, M.J.H.M. van der Loos, F. Rivadeneira, F. van Rooij, R. Thurik and A. Uitterlinden and the Gentrepreneur Consortium
• "Value sharing in organizations", with C. Roessler
• "An essay on the natural rate of entrepreneurship", with C. Roessler, earlier version available as Tinbergen Discussion Paper 09-105/3.
• "Testosterone and the gender gap in entrepreneurial activity", with P.J.F. Groenen, A. Hofman, M.J.H.M. van der Loos, F. Rivadeneira, F. van Rooij, R. Thurik and A. Uitterlinden
• "The impact of population heterogeneity on entrepreneurial incomes", with C. Roessler
• "Managerial compensation and the innovativeness of companies", with M. Schirge and J. Block
• "Gender diversity at the workplace: The role of sexual attraction and courtship behavior"
• "The sader, the wiser? Emotions and overconfidence", with T. Michl
• "Emotions and preferences for risk and ambiguity", with T. Michl
• "Non-monetary utility components in entrepreneurial decisions", with C. Schade

Referee

• NWO - De Nederlandse Organisatie voor Wetenschappelijk Onderzoek
• Journal of Business Venturing
• Small Business Economics
• Journal of Economic Psychology
• Journal of Economic Behavior and Organization
• Technovation
• Entrepreneurship Theory and Practice
• Advances in Austrian Economics
• Experimental Psychology
• Zeitschrift für Betriebswirtschaft
• Schmollers Jahrbuch (Journal of Applied Social Science Studies)
• Electronic Markets - The International Journal of Electronic Commerce and Business Media
• Academy of Management

Participation in third-party funded research projects

• A consortium for genetic research in the social sciences, NSF-sponsored workshop Feb 2011, co-organizer.
• Innovation and coordination - Volkswagen Stiftung, external collaborator, since 2006
  
• E-business market watch, European Commission, 2002-2006, Project Manager at DIW Berlin 2005-2006
  
• Global entrepreneurship monitor, work for the US team (2003, 2004), work for the Global Report (2005), member of the Dutch team (since 2006)
• Die volkswirtschaftliche Bedeutung von Netzwerken - Analyse und ordnungspolitischer Handlungsbedarf, German Ministry of Economic Affairs, 2005-2006