Abstract

The theory of equal opportunity as I have expounded it in Roemer uses a language comprising five words: objective, circumstance, type, effort, and policy. The objective is the kind of outcome or well-being or advantage for whose acquisition one wishes to equalize opportunities, in a given population. Circumstances are the set of environmental influences, beyond the individual’s control, that affect his or her chances of acquiring the objective. A type is the group of individuals in the population with a given set of circumstances. Effort is autonomously chosen action—within the individual’s control—which, if expended in greater amounts, will increase the degree to which the individual acquires the objective. A policy is a social intervention that is used to influence the degree to which individuals acquire the objective. The equal-opportunity policy is the one from the set of feasible policies that will make it the case that the degree to which individuals acquire the objective is independent of their circumstances, and sensitive only to their effort. I propose a way of computing the equal-opportunity policy in any given situation, given the appropriate data, and a decision as to what environmental aspects should be taken to constitute circumstances. This quick summary leaves out many details, which will be focused upon in what follows.