Chapter 13 The Construction and Estimation of Equivalence Scales and Their Uses

Equivalence scales are deflators (or “scales”) by which the incomes of different household types can be converted to a comparable, needs-adjusted basis. They are measures of intra-household sharing potentials and differences in family members’ needs (i.e., of adults vs. children). One strand of literature uses econometric approaches to derive equivalence scales from household expenditure and time-use data. Another strand uses survey responses of people to quantify equivalence scales directly. Equivalence scales are potentially useful in several areas such as welfare-system design, income taxation, measurement of poverty and inequality, and determining lost earnings damages. This chapter surveys the literature on equivalence scales and presents some applications.