Quasilinear utility
FUNCTION LINEAR IN ONE ARGUMENT (GENERALLY THE NUMERAIRE), USED IN ECONOMICS AND CONSUMER THEORY
Quasilinear utility function; Quasilinear utilities
In economics and consumer theory, quasilinear utility functions are linear in one argument, generally the numeraire. Quasilinear preferences can be represented by the utility function u(x_1, x_2, \ldots, x_n) = x_1 + \theta (x_2, \ldots, x_n) where \theta is strictly concave.