This working paper addresses the question whether imperfect competition in product markets contributes substantially to the level and persistence of unemployment in modern industrial economies. In section I, the paper documents the available empirical research of the origin and extent of product...

Previous empirical work on corporate growth rates using cross-section or short-panel econometric techniques suggests that growth rates are random but that some degree of mean reversion exists. This means that size differences between firms are transitory. Another, more natural way to explore the...

The people of Karakalpakstan, along with those of the entire Aral Sea region, are facing a multitude of health problems corresponding to the drying of the Aral Sea and accompanying ecological consequences. In case studies of other environmental disasters, research has shown that environmental...