"This paper demonstrates that levels of entrepreneurship can be greatly affected by the general policy environment. Using a state-level panel, we estimate the effects of several policy variables on rates of entrepreneurship and find that bankruptcy exemptions, corporate tax rates, and the level...

We study how the city system is affected by the possibility for the members of the same cultural diaspora to interact across different cities. In so doing, we propose a simple two- city model with two mobile cultural groups. A localized externality fosters the productivity of individuals when...

An integrated assessment (IA) model combines knowledge from very different disciplines in view of a practical problem. Most models developed so far are rather monolithic in the sense that it is difficult to combine components from different models for purposes of new assessments. We propose to...