We examine the effects of the 1990 Clean Air Act Amendments (CAAA) on ambient concentrations of PM10 in the United States between 1990 and 2005. Consistent with prior literature, we find that non-attainment designation has no effect on the average monitor in non-attainment counties, after...

This study evaluates the welfare implications of tariff reforms in the cereals sector of the SADC region. Applying the global simulation model (GSIM), a multi-country partial equilibrium model, to the cereals industries of thirteen SADC countries, the study computes price and welfare effects of...

Previous studies have found underestimation of risk, or overconfidence, to be a key factor in entrepreneurship. We use a simple model of competitive equilibrium to show that an irrational under-estimation of risk provides a competitive advantage leading to a greater chance of survival under...

Ecotourism presents developing countries with growing opportunities for attracting foreign exchange and enhancing economic growth, but also raises some pressing management challenges for national parks and other protected areas. This paper presents a framework for analyzing the impacts of...