This document discusses theories of factor pricing and distribution. It covers:
1) The significance of factor prices as the prices paid for land, labor, and capital. Factor prices allocate resources and determine incomes.
2) Marginal productivity theory, which states that factor prices equal the marginal productivity of each factor.
3) Modern distribution theory analyzes demand and supply to determine factor prices. Demand for a factor depends on demand for the final product, while factor supply increases with price.
4) Equity in income distribution refers to fair opportunities rather than equal incomes. Income inequality measures uneven income distribution.