According to Robert Fogel (1994a, 1994b), nutrition is the driving force for the increase in health human capital, which in turn has significantly promoted economic growth in the long run. In this paper, we take Fogel¡¯s finding to extend the standard Ramsey model by including the effect of...

We develop a directed-technological-change model to address the issue of the optimal patent system and investigate how the optimal patent system influences the direction of technological change and the inequality of wage, where patents are categorized as skill- and labor-complementary. The major...