The budget-constrained random utility model (RUM) gives utility-consis
tent measures of welfare, but requires the length of the planning peri
od be specified. An alternative is to treat the RUM probabilities as;b
ehavioral and calculate consumer surplus. This paper shows that such c
alculations lead to the same welfare measures as RUM calculations. The
paper provides support and an alternative justification for the stand
ard welfare measured. (C) 1995 Academic Press, Inc.