Optimizing Input and Output under the Scheme of Mudharabah

The research will elaborate producer behavior, specifically on input and output optimization under mudharabah scheme that will determine income distribution. We used calculus to derive propositions. Mudharabah economic principle shows that the increase in mudharibs barakah (blessing) due to the increasing amount of labor in a maslahat manner is equal to the maslahat value of net marginal product of labor. The increasing mudharibs barakah due to the increasing amount of raw material used in a maslahat manner equals to the maslahat value of net marginal productivity of raw material. The proposition related to wage level shows that wage level determined simultaneously by musyatarak akad (contract) reflects the value of net labor productivity weighted by mudharibs share of profit sharing. The higher certification cost per product unit, the lower the wage level. The increasing share of profit sharing for mudharib from shahibul maal will increase wage level. Increasing the share for mudharib from profit sharing by shahibul maal will increase the wage level per worker. Profit sharing contract between mudharib and shahibul maal highly determines wage level. In the agreement, both parties should calculate the impact of shares on labor wage.