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This paper presents an exchange rate model of a new kind. Instead of relying exclusively on macroeconomic determinants, the model includes a determinant from the field of microstructure financeorder flow. Order flow is a determinant because it conveys information. This is a radically different approach to exchange rates. It is also strikingly successful. Our model of daily deutsche mark/dollar log changes produces an R2 statistic above 60 percent. For the deutsche mark/dollar spot market as a whole, we find that 1 billion of net dollar purchases increases the deutsche mark price of a dollar by 0. 5 percent.
Evans et al. (Fri,) studied this question.