This paper examines the regions of indeterminacy in a two-sector real busin
ess cycle model with consumption habit formation and productive externaliti
es. It is shown that the indeterminacy result is largely unaffected when co
nsumption habits are introduced. The paper also demonstrates that habit for
mation lessens the countercyclical behavior of consumption which is present
in the original Benhabib and Farmer (1996) model.