A Fractional Cointegration Analysis of Purchasing Power Parity
购买力平价的分数协整分析AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要用分数协整分析购买力平价的长期均值回归,核心是经济时间序列的协整关系与动态调整。
购买力平价的分数协整分析AI 解读 ↓
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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 parity. Empirical results show that purchasing power parity reversion exists and can be characterized by a fractional process for several countries studied. The results support purchasing power parity as a long-run phenomenon, though significant short-run deviations can exist.