Yang, Seung-Ryong; Koo, Won W.; Wilson, William W. - In: Journal of Agricultural and Resource Economics 17 (1992) 01
This study examines three alternative models of correcting for heteroskedasticity in wheat yield: the time trend variance, the GARCH, and an econometric model that includes the potential sources of heteroskedasticity. Nonnested test results suggest that modeling the sources of heteroskedasticity...