theory of dynamic sorting and the role of customer behavior. We cannot determine whether this is because clients discriminate …

The recent literature on local schooling externalities in the U.S. is rather mixed: positive external effects of … average education levels are hardly to be found but, in contrast, positive externalities from the share of college graduates … effect) of college educated workers. By contrast, as no externalities are associated with the traditional technology, high …

providing new evidence helpful for discriminating between different types of externalities. We investigate four-digit level … most important factor in the transmission of externalities. This suggests that transactions externalities accruing … primarily to the seller, and/or activity-driven demand externalities are significant for explaining the short-run behavior of …

I develop a new theory of marketing costs and introduce it into a model of trade with product differentiation and firm …