With internationally mobile labour and the abolition of national border controls, the individual may not only have private information about his skill level (adverse selection), but also about the length of time he resides and works in the home country (moral hazard) and about his foreign...

Optimal regulation is developed for a case where heterogeneous firms expand or reduce the supply of an industry-specific public good. The sizes of the individual contributions or reductions are subject to private information, implying that external effects are present both in the firms' net...

I propose how to model memory loss of knowledge.

The paper studies how uncertainty about future trade arrangements affecting firms' competitiveness and market access, may influence firms' investment behaviour and choice of location. Our analysis is based on a model of imperfect competition, and we show that risk aversion is not a necessary...

Through a learning-by-doing process, a firm's efficiency depends positively on the extent of its previous business activity. From a dynamic incentives perspective, therefore, efficiency is endogenous. In addition, the efficiency of the firm is likely to be subject to private information. The...