Rates of return to state investments for two of Maine's post-secondary vocational technical institutes are presented. Southern Maine Vocational Technical Institute showed a rate of return to the state economy of 12 percent; Northern Maine Vocational Technical Institute, 2 percent. The usefulness of rate of return analysis as a planning tool or as a method of accountability is discussed, since any school teaching occupational skills needs to be evaluated as to its effectiveness and efficiency in meeting that objective. A complete test must include (1) how well graduates fare in labor markets and (2) the cost of producing those graduates with those skills. In these respects rate of return compares very favorably with other instruments for planning or accountability. The technique does bring important information to a manager of educational resources. (Author/LBH)