Marginal costThe increase in cost that accompanies a unit increase in output; the partial derivative of the cost function with respect to output.
Marginal rate of transformationMarginal rate of transformation
The increase in output of one good made possible by a one-unit decrease in the output of another, given the technology and factor endowments of a country; thus the absolute value of the slope of the transformation curve.
Marginal propensity to consumeMarginal propensity to consume
The fraction of a change in income (or perhaps disposable income) spent on consumption. Contrasts with average propensity to consume.
Marginal revenueMarginal revenue
The change in total revenue as a result of producing one additional unit of output.
Marginal rate of substitutionMarginal rate of substitution
In a production function or a utility function, the ratio at which one argument (input) substitutes for another along an isoquant or indifference curve.
Marginal propensity to importMarginal propensity to import
The fraction of a change in income (or perhaps disposable income) spent on imports. Contrasts with average propensity to import.
Further SuggestionsMarginal efficiency of capital
marginal tax rate
Marginal tax rate
Marginal value product
Value marginal product
Marginal revenue product
Marginal propensity to save