Testing PPP for the South African Rand/US Dollar Real Exchange Rate at Different Data Frequencies

作者: Guglielmo Maria Caporale , Luis A. Gil‐Alana

DOI: 10.1111/1467-8268.12131

关键词: EconometricsUs dollarMonetary policyExchange rateVariablesInternational economicsNull (mathematics)Order of integration (calculus)EconomicsMean reversionUnit root

摘要: This paper tests the PPP hypothesis for South African rand/ US dollar real exchange rate using a fractional integration framework. The results suggest that of rand with respect to is highly dependent variable an order very close 1. finding not affected by data frequency considered (daily, weekly or monthly). Also, there appears be single break in December 2001 (possibly corresponding change monetary policy framework), unit root null being rejected favour d > 1 periods before break, but afterwards. Thus, our strongly reject / across frequencies.

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