Today, in the rangeland management science and determination of rangecapacity, accurate and true information about range production is crucial. In fact, rangeproduction is considered as a basis for range management. The aim of this study was tocompare different methods for the estimation of forage production with four samplingmethods in the rangelands of Kurdistan province, Iran. The sampling m...

This study tests the efficiency wage hypothesIs by estimating wage and quit equations with data from the Employment Opportunity Pilot Project survey of firms. An efficiency wage model is derived that predicts effects of turnover costs and unemployment on wages as functions of first and second derivatives from the quit equation. The model is tested by examining the relationships between the coef...