In Wren (1994) I find that industrial subsidies have significantly gre
ater employment effects in small firms, and interpret this as arising
from the poorer access that these firms have to private funds. Holden
and Swales (1996) criticize this interpretation, arguing that financia
l constraints typically limit the effectiveness of subsidies. In this
paper I show that their results arise from the particular properties o
f the homogeneous production function. More generally, I show that the
effectiveness of assistance increases with the marginal cost of priva
te funds and is greater in those firms facing financial constraints. A
s such, differential access to private funds can explain the greater e
ffectiveness of assistance found in small firms.