Using a simple stochastic growth model that nests both exogenous and endogenous growth, this paper shows that the growth rate should be mean stationary if growth is exogenous and difference stationary if growth is endogenous and any variable affecting the investment rate is difference...

This paper focuses on the trade-off faced by governments in deciding the allocation of public expenditures between productivity-enhancing public infrastructures and utility-enhancing public consumption in a two-country model. The results show that a permanent increase in the domestic stock of...