The Civil War resulted in a substantial divergence in the regional structure of factor prices. In particular, wages fell in the South relative to the non-South, but interest rates and other measures of the costs of capital increased. Using archival data for manufacturing establishments, we show...

The belief that immigrants generate beneficial externalities in their host countries, specifically in the form of an increased opportunity and ability of firms to expand their foreign trade, has recently been challenged by George Borjas in Heaven's Door (1999, p. 97) as having no empirical...