This paper primarily reviews the panel stochastic frontier (SF) model in which the composite error term εit has four components, i.e. εit=τi−ηi+vit−uit, where ηi and uit are the persistent and transient inefficiency components, τi is the random firm effect and vit is the random noise....

This paper examines the role of seaport efficiency in the relationship between trade and welfare outcomes in Africa. Data on 28 African countries for the period 2006 to 2018 is employed while the system generalized method of moments estimation technique is used for the empirical analysis. The...

We derive and empirically apply an input-oriented distance function based on the stochastic ray production function suggested by L¨othgren (1997, 2000). We show that the derived ray-based input distance function is suitable for modeling production technologies based on logarithmic functional...