Theoretical models of growth reveal that either exogenous or endogenous, technology is the main driving force behind the long-run economic growth. Furthermore, in the endogenous growth framework, diffusion of technology is the basic mechanism of per capita income convergence among countries....

In Europe differences among countries in the overall change in happiness since the early 1980s have been due chiefly to the generosity of welfare state programs - increasing happiness going with increasing generosity and declining happiness with declining generosity. This is the principal...