It has been suggested that the extent of rent seeking expenditures ari
sing from attempts to influence budget allocations should be estimated
by the absolute magnitude of the observed changes in allocation. Inst
ead, we argue that it is the extent of the ex ante prospective changes
that determine the level of rent-seeking, and that in the presence of
countervailing activity these may be quite unrelated to the ex post o
bserved values. We further argue that the traditional rent-seeking mod
el of competition for a pre-specified rent is inappropriate in this co
ntext.