A number of studies have employed strategic complementarity to show th
at many features of the Keynesian framework can be captured in models
consistent with the microfoundations approach. We argue that strategic
complementarity is an important factor in understanding why an econom
y may exhibit a slow return to steady-state behavior after a temporary
shock. That is, given any of a variety of factors which would cause t
emporary shocks to have long-term effects, the speed with which the ec
onomy returns to steady-state behavior after a temporary shock is nega
tively related to the degree of strategic complementarity in the envir
onment.