Innovation depends on new ideas entering an organization and being tra
nslated into something implemented and used. This article identifies t
he determinants of this knowledge acquisition and transfer. Knowledge
is diffused through a variety of networks. One potentially important n
etwork is formed by professional associations, which diffuse a specifi
c body of knowledge to practitioners and create informal networks of w
eak ties, linking members from different organizations. A survey of a
particular association's members is used to identify the variables tha
t predict the level of two types of technological innovation. Results
show that professional association networks are important for innovati
on in specific, operational technologies, although infernal communicat
ion factors and organization size are also significant predictors For
more complex technologies that have implications for the overall philo
sophy of operations, different predictors-the existence of a technolog
y strategy, the level of external communication, and the level of infl
uence of individuals-are relevant.