The productivity of individual dairy farms, decomposed into efficiency and technological change components, was measured annually from 1985 through 1993 from distance functions estimated using nonparametric programming methods. Technology is measured regressively only if it is regressive to all...

Technical efficiencies calculated using aggregated inputs are biased. It is shown empirically and analytically that input aggregation decreases calculated technical efficiencies and changes relative technical efficiencies among firms. Moreover, aggregation fails to separate technical efficiency...

I argue that much of what researchers have been measuring as technical inefficiency may be allocative inefficiency. When inputs are aggregated it is shown that any allocative inefficiency is manifested as technical inefficiency. Greater degrees of aggregation may produce lower measures of...

The productivity of farmers at six different age cohorts was computed by estimating production functions using 1987 census data. The results suggest that farmers of different ages operate with slightly different technologies and use various inputs at different efficiencies. Compared with...

Farmer productivity by age was estimated, allowing for differences because of efficiency and returns to scale. Using Census of Agriculture data, estimates vary by state, but returns to scale average 1.07. Efficiency increases average 4.5 percent every ten years of age, to the age interval 35 to...