Evaluation of Welfare Change in Quantity-Constrained Regimes*

There are many circumstances where individuals are subject to constraints other than income and prices. Evaluation of welfare change from a price-taking position to a quantity-constrained position presents special problems. While remaining firmly in the partial-equilibrium tradition, indifference curves in the price-quantity space are applied to the identification of an equivalent variation. a modified Marshallian measure and a compensating variation in quantity-constrained situations. These measures satisfy the condition of CV < MS < EV for a normal good. A Marshallian measure that has been used—the ‘simple Marshallian measure’—is shown to have a considerable drawback.