Relative Price Variability and Inflation
通过一个简单但通用的价格变化随机模型，证明相对价格变动性与通胀率、未预期通胀及通胀变化之间的回归关系是定义性的人为产物，对理解这些变量间的统计关系有参考价值。
Regression studies have established that there tend to be convex, nonsymmetric relationships between relative price variability and the inflation rate, unanticipated inflation, and the change in the inflation rate. This paper shows that such regression results follow as definitional artifacts for a simple but quite general stochastic model of price changes. The analysis is based on the fact that the definitions of relative price variability, the inflation rate, unanticipated inflation, and the change in the inflation rate imply a particular structure for the covariances among these variables. The structure of these covariances has implications for the regression coefficients. Copyright 1991 by Ohio State University Press.