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Modelling the Dependency between Inflation and Exchange Rate Using Copula

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  • Charles Kwofie
  • Isaac Akoto
  • Kwaku Opoku-Ameyaw

Abstract

In this paper, we propose a copula approach in measuring the dependency between inflation and exchange rate. In unveiling this dependency, we first estimated the best GARCH model for the two variables. Then, we derived the marginal distributions of the standardised residuals from the GARCH. The Laplace and generalised t distributions best modelled the residuals of the GARCH(1,1) models, respectively, for inflation and exchange rate. These marginals were then used to transform the standardised residuals into uniform random variables on a unit interval [0, 1] for estimating the copulas. Our results show that the dependency between inflation and exchange rate in Ghana is approximately 7%.

Suggested Citation

  • Charles Kwofie & Isaac Akoto & Kwaku Opoku-Ameyaw, 2020. "Modelling the Dependency between Inflation and Exchange Rate Using Copula," Journal of Probability and Statistics, Hindawi, vol. 2020, pages 1-7, June.
    • Handle: RePEc:hin:jnljps:2345746
    DOI: 10.1155/2020/2345746
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