8Ahmad, Sultan(1983》, "International. Comparison of Chinese Prices, "unpublished working paper, Economic Analysis and Projections Departraent, World Bank.
9Cheung, Y. - W. and Lai, K. S. (1993》 "A fractional cointegration analysis of purchasing power parity", Journal of Business and Economic Statistics,11(1):103-12
10Chinn, M. D. : Explaining Exchange Rate Behavior, NBER report 2003.
