This paper provides an easily verifiable sufficient condition for topologic
al chaos for unimodal maps which can be satisfied when the well-known Li-Yo
rke condition is not satisfied. It then shows how this result can be applie
d to a model of endogenous growth with externalities to establish the exist
ence of chaotic equilibrium growth paths in that framework. Journal of Econ
omic Literature Classification Numbers: C61, D90, O41. (C) 2001 Academic Pr
ess.