Schlee, Edward E. - In: Economics Letters 120 (2013) 3, pp. 570-572
I show that local changes in five welfare measures are equal: a measure proposed by Radner (1993); consumers’ surplus; the Slutsky change in real wealth; the Divisia quantity index, and Debreu’s (1951) coefficient of resource utilization (the last two rescaled in units of a numeraire good).