We review nonparametric estimation of efficiency and productivity, by which we mainly mean activity analysis, or data envelopment analysis (DEA). The review covers topics that we hope will be of special interest to those doing research in the realm of agriculture. We also include a brief...

Efficiency Indicators And Indexes -- The Nerlovian Profit Indicator -- The Revenue Efficiency Indicator -- Cost Efficiency Indicator -- Efficiency Indexes -- From Indicators to Indexes -- Hyperbolic Efficiency -- Remarks on the Literature -- Environmental Performance -- Good and Bad Outputs --...

In his 2005 paper in this journal, Kuosmanen argues that Shephard's specification of weak disposability in activity analysis (DEA) models is not correct. We show that Shephard's specification does satisfy weak disposability and is the smallest technology to do so