INPUT SUBSTITUTION IN IRRIGATED AGRICULTURE IN THE HIGH PLAINS OF TEXAS, 1970-80

The adaptability of irrigated agriculture in the High Plains region of Texas in the 1970-80 period is analyzed by estimating Allen partial elasticities of substitution for five key inputs (water, labor, center pivot, furrow and wheel roll systems) used to produce two crops (cotton and grain sorghum). The results indicate that farmers have adapted to changes in a manner generally consistent with prior expectations concerning complementarity and substitutability among inputs. The output–constant price elasticities of water demand was statistically significant but relatively small (-25).Farm Management,

Are net discount ratios stationary?: the implications for present value calculations

Wages ; Interest rates

Was There a Structural Break in Barry Bonds’ Bat?

We utilize time series tests to investigate if Barry Bonds’ batting has a deterministic or stochastic trend and to test if structural breaks occur. Bonds’ monthly on base percentage plus slugging percentage (OPS) is examined from 1986 to 2007. We find that Bonds’ OPS is stationary around two level and trend breaks. We find that Bonds’ OPS initially follows a positive trend to the age of 28.9 (June 1993), which coincides roughly with the expected peak performance age (27.6) for a MLB batter as identified by Fair (2008). Following this break, we find that Bonds’ OPS was on a plateau until a second break in September 2000. At this point, at the age of 36.1, Bonds’ OPS jumps up unexpectedly and declines slowly thereafter until his retirement in September 2007 at age 43. Key Words: age-effects, peak performance, baseball, OPS, structural break

Are net discount rates stationary?: some further evidence

Discount

Input Substitution in Irrigated Agriculture in the High Plains of Texas, 1970-80

This article discusses input substitution in irrigated agriculture in the high plains of Texas

Calculating Changes in Worklife Expectancies and Lost Earnings in Personal Injury Cases

Article discussing research on the estimated effect of an injury on a worker's life expectancy, worklife expectancy and discounted expected income