Are Crop Yields Normally Distributed?
重新评估了作物产量非正态性的证据，指出以往研究在模型设定、统计显著性和数据使用上的三个方法论问题，并提出正确检验产量正态性的原则。
Abstract The evidence for nonnormality of crop yields is reassessed. Three methodological problems are identified in typical yield distribution analyses: ( i ) misspecification of the nonrandom components of yield distributions, ( ii ) missreporting of statistical significance, and ( iii ) use of aggregate timeseries (ATS) data to represent farm‐level yield distributions. One or more of these problems infect virtually all evidence against normality to date. The positive contribution of the article is a set of principles that must be followed in any valid investigation of yield normality.