We examine the impact of an increase in technological asymmetry on the
success of joint product development ventures, with a view of explori
ng the free-riding problems inherent in cooperative R&D. We find that
if technological diversity increases, then the chances that a joint ve
nture forms at all is reduced. Given that a joint venture forms, howev
er, an increase in technological diversity increases the probability o
f success. The increase in the effort stream under cooperative R&D is,
however, less than the increase in the efficient effort stream, so th
at the gap between the two increases.