How many cartels are there? The answer is important in assessing the need for competition policy. We present a Hidden Markov Model that answers the question, taking into account that often we do not know whether a cartel exists in an industry or not. We take the model to data from a period of...

Using 15 years of data on Finnish twins, we find that 24% (54%) of the variance of women's (men's) lifetime income is due to genetic factors and that the contribution of the shared environment is negligible. We link these figures to policy by showing that controlling for education reduces the...

We examine whether the organisation of individual researchers into departments has an impact on the average research quality, beyond the impact of the individuals themselves. Using data on science disciplines generated from the UK Research Assessment Exercises in 1996, 2001 and 2008, we find...

We extend the theoretical basis of the empirical literature on the effects of R&D subsidies by providing an estimable model of strategic interaction among subsidy applicants, and public and private sector R&D financiers. Our model incorporates fixed R&D costs and a cost of external finance. We...

We document the level, type, and severity of crime in rural Bangladesh. Crime affected 36% of the households. The average cost of crime was worth two weeks' household consumption. We then study how microcredit affects crime. Our theoretical model shows how microcredit may increase cost of crime...

The return that inventors appropriate from their inventions forms a key incentive and remuneration mechanism for innovation. We utilize data on U.S. patents and their inventors linked to Finnish employer-employee data to estimate the effect of patenting on earnings. Inventors get a temporary 3%...

This paper studies the welfare effects of Ramp;D subsidies. We develop a model of continuous optimal treatment with outcome heterogeneity where the treatment outcome depends on applicant investment. The model takes into account heterogeneous application costs and identifies the treatment effect...