We investigate incidence and evolution of patent thickets. Our empirical analysis is based on a theoretical model of patenting in complex and discrete technologies. The model captures how competition for patent portfolios and complementarity of patents affect patenting incentives. We show that...

Economists traditionally tackle normative problems by computing optimal policy, ie the one that maximizes a social welfare function. In practice, however, a succession of marginal changes to a limited number of policy instruments are implemented, until no further improvement is feasible. I call...

Employing a variant of GARP, we study consistency in aging by comparing the choices of younger adults (YA) and older adults (OA) in a 'simple', two-good and a `complex' three-good condition. We find that OA perform worse than YA in the complex condition but similar in the simple condition....

A large portion of innovators do not patent their inventions. This is a relative puzzle since innovators are often perceived to be at the mercy of imitators in the absence of legal protection. In practice, innovators however invest actively in making their products technologically hard to...

Using input-output and world price data, this study computes domestic resource costs (DRCs) for branches of manufacturing industry in Bulgaria, Czechoslovakia, Hungary, Poland and the former Soviet Union. The results show a wide dispersion of DRCs in each country, including branches with...

This paper develops a framework for studying the interactions between labour unions, fiscal policy, monetary policy and monopolistically competitive firms. The framework is used to investigate the effects of labour taxes, the replacement ratio, labour market institutions and monetary...