Previous articles have noted the possibility of socially ineficient levels of entry in markets in whichJirms must incurjixed set-up costs upon entry. This article identijies thefundamental and intuitive forces that lie behind these entry biases. Ifan entrant causes incumbentJirms to reduce output, entry is more desirable to the entrant than it is to society. There is therefore a tendency toward...

Estimation of technical efficiency is widely used in empirical research using both cross-sectional and panel data. Although several stochastic frontier models for panel data are available, only a few of them are normally applied in empirical research. In this article we chose a broad selection of such models based on different assumptions and specifications of heterogeneity, heteroskedasticity ...

We present the theoretical foundation for an adjustment cost technology that supports the intertemporal production decision making behavior using the directional distance function. Dynamic input efficiency measures are developed that can separate out the impact of variable and dynamic factors inefficiency levels. An approach to implement this theory in a nonparametric fashion is developed and a...