This paper constructs a two-country stochastic growth model in which neutraland investment-specic technology shocks are nonstationary but cointegrated acrosseconomies. It uses this model to interpret data showing that while real investmenthas grown faster than real consumption in the United...

"In the presence of infrequent but observable structural breaks, we show that a model in which the representative agent is on a rational learning path concerning the real consumption growth process can generate high equity premia and low risk-free interest rates. In fact, when the model is...

"We show that when in Lucas trees model the process for dividends is described by a lattice tree subject to infrequent but observable structural breaks, in equilibrium recursive rational learning may inflate the equity risk premium and reduce the risk-free interest rate for low levels of risk...