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带宽选择、预白化与 Phillips–Perron 检验的功效AI 解读

This study examines several important practical issues concerning nonparametric estimation of the innovation variance for the Phillips-Perron (PP) test. A Monte Carlo study is conducted to evaluate the potential effects of kernel choice, databased bandwidth selection, and prewhitening on the power property of the PP test in finite samples. The Monte Carlo results are instructive. Although the kernel choice is found to make little difference, data-based bandwidth selection…

增广Dickey–Fuller检验的滞后阶数与临界值AI 解读

Response surface analysis is used to obtain approximate finite-sample critical values for the augmented Dickey-Fuller test. Previous studies estimating the critical values for the test have generally ignored their possible dependence on the lag order. This study shows that the lag order, in addition to the sample size, can affect finite-sample behavior of the test. The result points to the importance of correcting for the effect of lag order in applying the augmented…

增广 Dickey–Fuller 检验的滞后阶数与临界值AI 解读

Response surface analysis is used to obtain approximate finite-sample critical values for the augmented Dickey-Fuller test. Previous studies estimating the critical values for the test have generally ignored their possible dependence on the lag order. This study shows that the lag order, in addition to the sample size, can affect finite-sample behavior of the test. The result points to the importance of correcting for the effect of lag order in applying the augmented…

购买力平价的分数协整分析AI 解读

A generalized.notion of cointegration, called fractional cointegration, is introduced to examine the long-run purchasing power parity hypothesis. By allowing deviations from equilibrium to follow a fractional process, the fractional cointegration analysis can capture a wider range of mean reversion behavior than standard cointegration analyses. This gain in flexibil ity in modeling mean-reverting dynamics is found to be important for evaluating long-run purchasing power…