Stochastic trend, weather and US corn yield variability
- 1 May 1992
- journal article
- research article
- Published by Taylor & Francis in Applied Economics
- Vol. 24 (5) , 513-518
- https://doi.org/10.1080/00036849200000064
Abstract
Regional corn yield models incorporating stochastic trends, prices and weather variables are estimated. Hypothesis tests suggest yield variability has increased because of an increase in error variance and an increase in weather-related effects. Decomposition of the error variance shows much of its increase is due to an increased correlaion between regional yields.Keywords
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