This article presents a group of exercises of level and growth decomposition of output per worker using cross-country data from 1960 to 2000. Its shown that at least until 1975 factors of production ( capital and education) were the main cause of output dispersion and that productivity variance...

We model an environment in which different vintages of capital with their different productivities coexist. A reduction in the cost of investment induces investment in new capital which raises both measured capital and measured productivity simultaneously. We calibrate this model to...

We examine the possibility of a Pareto-improving pay-as-you-go social security system, using an ex-ante welfare criterion. Our objective is to identify the conditions under which a suitably designed pay-as-you-go social security system is welfare improving, when markets are complete and...

In an influential paper Angeletos (2002) argues that, even in the absence of state contingent debt, governments can achieve a complete market outcome through issuing bonds of different maturities. The key insight is that fluctuations in the yield curve are exploited through holding or selling...