“…Few studies investigated the efficiency of vocational educa tion in terms of the marginal and average costs of vocational education and the optimum size of the program (Cohn et al, 1972;Hu et al, 1969;Osburn and Goishi, 1974). Concerning geographic factors, some studies were conducted on a city-wide basis (Corazzini, 1968;Hu et al, 1969;Kaufman and Lewis, 1968;Taussig, 1968). During the recent decade, most studies were conducted on a state-wide basis (Cohn et al, 1972;DeVore and Scott, 1974;Doty et al, 1976;Harris, 1972;Koch, 1972;Ohio State Department of Education, 1975;Webb, 1974).…”