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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...

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...

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 ...

Introduction: Oral manifestations can be the first signs of human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) and a useful marker for the progression of this disease. The present study aimed to determine the prevalence of oral manifestations and examine their relationship with socio-demographic factors in HIV-positive patients in the health centers affiliated to Zahedan...

The recognition that ethical conduct is fundamental to accountability, transparency, fairness, equity, and quality service delivery which are the cornerstones of good governance reason for rules regulations in Nigerian government’s bureaucracy. This governmental administrative machinery, however, continues face a crucial challenge inefficiency unethical practices. study interrogates how conduct...