Panel Data Models and the Uncovered Interest Parity Condition: The Role of Two-Way Unobserved Components
本文发现，单方程回归常拒绝未抛补利率平价条件，但使用含双向未观测成分的面板数据模型后，该条件不再被拒绝，尤其当时间固定效应能控制汇率风险溢价与利率的相关性时。
This paper endeavours to show how the specification of the regression testing the uncovered interest parity (UIP) condition can determine whether or not the hypothesized proportional relationship between international interest rate differences and exchange rate changes is rejected. Across major currencies, various terms to maturity, different data frequencies and the short as well as the long time horizon, single-equation regressions partly reject the UIP condition. However, this ‘UIP puzzle’ tends to disappear when panel data regressions account, for example, for risk premiums by means of two-way unobserved component specifications with random or fixed effects for both currencies and time periods. The closest concurrence with the UIP condition arises when specifying the time-specific component as fixed effect, which provides a way to address the potential bias when unobserved exchange rate risk premiums correlate with interest rates. Copyright © 2016 John Wiley & Sons, Ltd.