This paper offers a new approach to estimate countries' de facto exchange rate regimes, a synthesis of two techniques. One is a technique that the authors have used in the past to estimate implicit de facto weights when the hypothesis is a basket peg with little flexibility. The second is a technique used by others to estimate the de facto degree of exchange rate flexibility when the hypothesis is an anchor to the dollar or some other single major currency, but with a possibly substantial degree of flexibility around that anchor. Because many currencies today follow variants of band-basket-crawl, it is important to have available a technique that can cover both dimensions, inferring weights and flexibility. We try out the technique on some 20 currencies over the period 1980–2007. Most are currencies that have officially used baskets as anchors for at least part of this sample period. But a few are known floaters or known simple peggers. In general, the synthesis technique seems to work as it should.
Frankel, Jeffrey, and Shang-Jin Wei. "Estimation of De Facto Exchange Rate Regimes: Synthesis of the Techniques for Inferring Flexibility and Basket Weights." IMF Staff Papers 55, no. 3 (July 2008): 384-416.
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