In this paper we examine the role of the formation of human capital in
propagating shocks over the business cycle. We show that a two-sector
equilibrium business cycle model with human capital is able to genera
te persistence in the growth of output and other aggregate variables c
omparable to that observed in the post-war US data. A key feature is t
he relatively low elasticity of substitution between skilled and unski
lled labor in the production of human capital. (C) 1998 Elsevier Scien
ce B.V. All rights reserved.