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Market efficiency, purchasing power parity and cointegration in Central American black foreing exchange markets

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  • José Roberto López

    (Consejo Monetario Centroamericano)

Abstract

The assumption that black market exchange rates follow a random walk and /or are determined by the purchasing power parity conditions in comonly imposed in macreoconomic models. The results from standard tests of black market efficiency, under the weak form, are not conclusive withoutany ambiguity whenever they are applied to nonstationary time series. This paper compares then with the unambiguous results arising from the application of the theory of cointegration to the study of market efficiency and purchasing power parity in the black market exchange rates of Costa Rica, El Salvador and Guatemala.

Suggested Citation

  • José Roberto López, 1993. "Market efficiency, purchasing power parity and cointegration in Central American black foreing exchange markets," Estudios Económicos, El Colegio de México, Centro de Estudios Económicos, vol. 8(1), pages 111-153.
    • Handle: RePEc:emx:esteco:v:8:y:1993:i:1:p:111-153
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    File URL: https://estudioseconomicos.colmex.mx/index.php/economicos/article/view/290/293
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