This paper shows that the presence of conditional staging in R&D (Research & Development) has a critical impact on portfolio risk, and changes diversification arguments when a portfolio is constructed. When R&D projects exhibit option-like characteristics, correlation between projects plays a...

This discussion paper resulted in a publication in the <I>Journal of Corporate Finance</I> (2011). Vol. 17, issue 5.<P> This paper analyzes the impact of blockownership dispersion on firm value. Blockholdings by multiple blockholders is a widespread phenomenon in the U.S. market. It is not clear, however,...</p></i>

This paper tests whether upstream R&D cooperation leads to downstream collusion. We consider an oligopolistic setting where firms enter in research joint ventures (RJVs) to lower production costs or coordinate on collusion in the product market. We show that a sufficient condition for...

This paper estimates the impact of the murder of film maker Theo vanGogh on November 2, 2004, on listed house prices in Amsterdam with aunique dataset. We use an hedonic-market approach to show that gen-eral attitudes towards Muslim minorities were negatively affected by themurder. Specifically,...

Impact evaluations of development programmes usually focus on a comparison of participants with a control group. However, if the programme generates externalities for non-participants such an approach will capture only part of the programme’s impact. Based on a unique large-scale quantitative...

This paper addresses the question to what extent the performance of industrial sites is affected by their local economic structure and accessibility. For this aim, we test for the existence of statistically significant relationships between agglomeration externalities (specialization, diversity,...

This discussion paper resulted in a publication in the <A href="http://www.sciencedirect.com/science/article/pii/S0014292112001493">'European Economic Review'</A> 2013, 58, 31-57.<P> In this paper, we use a recent policy change in the Netherlands to study how changes in search requirements for the older unemployed affect their transition rates to employment, early retirement...</p></a>

This paper examines the empirical analysis of treatment effects on duration outcomes from data that contain instrumental variation. We focus on social experiments in which an intention to treat is randomized and compliance may be imperfect. We distinguish between cases where the treatment starts...

This paper analyzes the impact of a leading entrepreneurship education program on college students’ entrepreneurship competencies and intentions using an instrumental variables approach in a difference-in-differences framework. We exploit that the program was offered to students at one...