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This study analyzes increasing returns to scale using general equilibrium theory to take into account the interactions between production in the public and private sectors. It also explores how the redistribution of income has been effected by financing the private sector

8 International mail surveys were undertaken from the methodological perspective of cross-culturally validating response-increasing techniques & from the practical angle of finding viable alternatives to increasingly prohibitive costs of conducting personal interviews overseas. The techniques investigated were registered mail, personalization, advance postcard, & reward. Studies were conducted in Argentina, Colombia, Mexico, Peru, Venezuela, Kenya, & Ivory Coast. The conclusions are that: (1) while the use of such techniques may effectively increase response rates in international mail surveys, using more than 1 of the techniques in a single survey would not likely produce more returns than using only 1, (2) registration of letters produced significantly greater returns more consistently than other techniques, (3) registration of letters has the additional advantage of allowing a better estimate of actual return rate as it provides information on undelivered letters, (4) registering a sample of questionnaires is advisable if cost is a concern, & (5) a 2nd wave in international mail surveys should be undertaken about 4 weeks following the 1st mailing & should increase the total return by an absolute level of 15-25%. 2 Tables. AA.