According to independently developed hypotheses by Michael Darby (1975) and Martin Feldstein (1976) nominal interest rates will increase during an inflationary period by an amount which is greater than the expected rate of inflation. This occurs in order to compensate lenders for the expected...

William Gissy (1987) is absolutely correct when he asserts that the existence of a complete inverted Fisher Effect renders our test for the Darby Effect a simple measure of tax arbitrage. His mathematical development of this is well done and completely valid. Our statement on page 59 of our...