In this paper, we show the importance of accounting for heterogeneity among sample firms in stochastic frontier analysis. For a fairly homogenous sample of German savings and cooperative banks, we analyze how alternative theoretical assumptions regarding the nature of heterogeneity can be...

Traditional exchange rate models are based on differences in macroeconomic fundamentals. However, despite being well grounded in economic theory they have a rather poor out-of sample forecasting record. This empirical failure may be a result of the overly restrictive choice of macroeconomic...