The papers by Donald Hodgman and Thomas Mayer are concerned with two general questions: (1) The differential effects of monetary policy on different sectors of the economy, and (2) the use of selective credit controls to implement both general monetary policy and to alter the allocation of credit. Both Hodgman and Mayer pay particular attention to specific questions of interest to them. Mayer concentrates on the alleged discriminatory impact of tight money on housing. Hodgman devotes much of his paper to the use of selective credit controls as a tool for altering the allocation of credit in the market. Implicit in both analyses is some theory of optimal policy execution in a setting where the free market allegedly fails to produce socially acceptable results. Much theory has been put forth in this setting as far as tax and expenditure policies are concerned. Very little general theory has been developed as far as monetary policy is concerned. Both Mayer and Hodgman present theoretical discussions of specific issues but do not relate this theory to an overall approach to monetary policy execution. This is an ideal opportunity to initiate a discussion along such lines. There are, really, two topics for consideration. The first topic concerns the optimal execution of an overall policy of monetary ease or restraint, while the second issue concerns the optimal execution of a policy to alter the allocation of credit. Each will be discussed in turn. Let us assume for the moment that in all segments of the economy social costs equal private costs and social benefits equal private benefits. The imposition of monetary ease or restraint (in order to maintain full employment without inflation) must, therefore, take place without altering the efficiency of the free market's allocation of resources.1 In other words, we must minimize the welfare costs of a given monetary (or stabilization) policy. Assuming that some stabilization policy is