This paper o¤ers to investigate both the Friedman's and Mishkin's hypotheses on the consequences of inflation on output … countries, we distinguish between short-medium and long run and between headline and core inflation. We get two main results …. First, nominal uncertainty and inflation are positively linked. Second, headline inflation negatively Granger causes out …

measured by inflation and output growth volatility in developing economies. We adopt the quasi-random controlled experiments …