In this paper we study the relationship between output and inflation for India, South Africa and Brazil, using the EGARCH model. For India and South Africa, we find evidence of: (1) the Cukierman and Meltzer hypothesis that inflation volatility raises inflation; (2) the Friedman hypothesis that inflation raises inflation volatility; and (3) the Black hypothesis that output volatility raises output growth, and that output volatility reduces inflation. For Brazil, we do not find any evidence of a systematic relationship between inflation and output growth. (C) 2012 Elsevier B.V.All rights reserved.