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Sometimes it is suggested that end users can improve forecasts by some kind of corrections. At least implicitly, the idea is to use such corrections if the forecasts appear too inaccurate by some criteria. Alternative forecasts can be defined based on whether a preliminary test of forecast usefulness and a subsequent correction has been made. The mean squared errors of some such forecasts are studied using some recent results on inequality pretesting. Uncorrected forecasts…

检验产出与通胀权衡中的卢卡斯假说AI 解读

A Bayesian highest-posterior interval test that accounts for heteroscedasticity and for two regimes of autocorrelation is derived to test the Lucas variance hypothesis on output-inflation trade-offs. Japanese and U.S. data show that heteroscedasticity and autocorrelation tend to influence the test results. A Bayesian procedure and Akaike's information criterion are used to determine the order or autoregressive schemes, and a join point to partition the sample is estimated by…