Modeling Stock Prices without Knowing How to Induce Stationarity
无需预先确定平稳化方式的股票价格建模:计算更正AI 解读 ↓
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无需预先确定平稳化方式的股票价格建模:计算更正AI 解读 ↓
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In “Modeling Stock Prices without Knowing How to Induce Stationarity” (1994, Econometric Theory 10, 701–719), we used posterior-odds calculations to evaluate restrictions imposed by a present-value model of stock prices across the equations of a VAR representation of stock prices and dividends. The results we reported are tainted by the omission of two factors: the Jacobians induced by the mapping of our priors over VAR parameters β into the restricted sample spaces relevant under hypotheses H 2 -H 4 (hence, tainting our calculations of p ( H i |y,X) in (22) for i = 2–4), and an integrating constant needed in calculating the unrestricted probability p ( H i |y,X) in (22). Table 1 reports our revised calculations, which differ substantively from those reported previously.