“…The equity or proportionality principle of distributive justice minimally requires that outcomes or receipts should be an increasing function of inputs or contributions; that is, the greater the contribution an individual makes, the more he or she should receive (Harris, 1976;Moschetti, 1979;Walster, Berscheid and Walster, 1973;Walster, Walster and Berscheid, 1978;Wagstaff and Perfect, 1992). However, there has been considerable disagreement as to the formula that best describes the concept of equity (Harris, 1976(Harris, , 1980Harris, Messick and Sentis, 1981;Farkus and Anderson, 1976;Wagstaff and Perfect, 1992).…”