This classic set of essays by Nobel Laureate and leading monetary theorist Milton Friedman presents a coherent view of the role of money, focusing on specific topics related to the empirical analysis of monetary phenomena and policy. The early chapters cover factors determining the real quantity of money held in a community and the welfare implications of policies that affect the quantity held. The following chapters formally restate why quantity analysis has become central to the science of economics. Friedman's presidential address to the American Economic Association, included here, provides a general summary of his views on the role of monetary policy, with an emphasis on its limitations and its possibilities. This theoretical framework is used in examining a number of empirical problems: the demand for money, the explanation of price changes in wartime periods, and the role of money in business cycles …