{"title":"Re-examining the real interest rate parity hypothesis under temporary gradual breaks and nonlinear convergence","authors":"Mübariz Hasanov, Tolga Omay, Vasif Abioglu","doi":"10.1007/s10258-023-00245-2","DOIUrl":null,"url":null,"abstract":"<p>This paper investigates the real interest parity hypothesis by testing stationarity of real interest rate differentials for 52 countries with respect to the USA. Taking account of the fact that both asymmetric adjustment and gradual temporary breaks may better characterize the dynamics of real interest rate differentials, we propose a new test that allows for two temporary shifts together with asymmetric adjustment towards the equilibrium. We employ the newly proposed test procedure along with the conventional ADF test as well as nonlinear KSS and OSH tests to examine stationarity of real interest rate differentials. Among the main results, we find that the newly proposed unit root test procedure highly outperforms the existing unit root tests in terms of rejecting the null hypothesis of unit root. Our results suggest that real interest rate differentials can be characterized by a stationary process with asymmetric adjustment around gradual and temporary shifts of mean.</p>","PeriodicalId":45031,"journal":{"name":"Portuguese Economic Journal","volume":"46 1","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Portuguese Economic Journal","FirstCategoryId":"96","ListUrlMain":"https://doi.org/10.1007/s10258-023-00245-2","RegionNum":4,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ECONOMICS","Score":null,"Total":0}
引用次数: 0
Abstract
This paper investigates the real interest parity hypothesis by testing stationarity of real interest rate differentials for 52 countries with respect to the USA. Taking account of the fact that both asymmetric adjustment and gradual temporary breaks may better characterize the dynamics of real interest rate differentials, we propose a new test that allows for two temporary shifts together with asymmetric adjustment towards the equilibrium. We employ the newly proposed test procedure along with the conventional ADF test as well as nonlinear KSS and OSH tests to examine stationarity of real interest rate differentials. Among the main results, we find that the newly proposed unit root test procedure highly outperforms the existing unit root tests in terms of rejecting the null hypothesis of unit root. Our results suggest that real interest rate differentials can be characterized by a stationary process with asymmetric adjustment around gradual and temporary shifts of mean.
期刊介绍:
The Portuguese Economic Journal publishes high-quality theoretical, empirical, applied or policy-oriented research papers on any field in economics. We enforce a rigorous, fair and prompt refereeing process. The geographical reference in the name of the journal only means that the journal is an initiative of Portuguese scholars. There is no bias in favour of particular topics and issues.Officially cited as: Port Econ J