This paper analyzes the relationship between technological progress, wage inequality, intergenerational earnings mobility, and economic growth. In periods of major technological inventions, a decline in the relative importance of initial conditions raises inequality, enhances mobility, and generates a larger concentration of high-ability individuals in technologically advanced sectors, stimulating future technological progress and growth. However, once technologies become more accessible, mobility is diminished and inequality decreases but becomes more persistent. The reduction in the concentration of ability in technologically advanced sectors diminishes the likelihood of technological break-throughs and slows future growth. User friendliness, therefore, becomes unfriendly to future economic growth.

This paper analyzes theoretically and empirically the role and significance of occupational mobility in the labor market focusing on individuals' careers. It provides additional dimensions to the analysis of investment in human capital, wage differences across individuals, and the relationships among promotions, quits, and interfirm occupational mobility. It is shown that part of the returns to education is in the form of higher probabilities of occupational upgrading, within or across firms. Given an origin occupation, schooling increases the likelihood of occupational upgrading. Furthermore, workers who are not promoted despite a high probability of promotion are more likely to quit.

This paper examines a novel mechanism linking fertility and growth. There are three components to the model: first, increases in capital per worker raise women's relative wages, since capital is more complementary to women's labor input than to men's. Second, increasing women's relative wages reduces fertility by raising the cost of children more than household income. And third, lower fertility raises the level of capital per worker. This positive feedback loop generates a demographic transition: a rapid decline in fertility accompanied by accelerated output growth.

This paper develops a two-sector overlapping-generations model. It characterizes the dynamical system globally and establishes sufficient conditions for the existence of a globally unique perfect-foresight equilibrium. It provides, therefore, a useful framework for global dynamic analysis of phenomena whose modeling requires a multidimensional commodity space. The analysis demonstrates that gross substitutability in consumption is not sufficient for the determinacy of equilibrium in this production economy. However, if in addition the investment good is capital intensive and second period consumption of two-period-lived individuals is a normal good, then the perfect-foresight equilibrium is globally unique.

This paper suggests that the demise of the capitalists—workers class structure was a socio-economic transformation orchestrated by the capitalists in reaction to the increasing importance of human capital in sustaining their profit rates. Physical capital accumulation in the process of industrialization enhanced the importance of human capital in production and generated incentives for capitalists to support the provision of public education for the masses, triggering the demise of the existing class structure. The implications of the theory are consistent with the voting patterns on England's education reform of 1902.

This paper develops a growth theory that captures the replacement of physical capital accumulation by human capital accumulation as a prime engine of growth along the process of development. It argues that the positive impact of inequality on the growth process was reversed in this process. In early stages of the Industrial Revolution, when physical capital accumulation was the prime source of growth, inequality stimulated development by channelling resources towards individuals with a higher propensity to save. As human capital emerged as a growth engine, equality alleviated adverse effects of credit constraints on human capital accumulation, stimulating the growth process.

This paper develops a growth theory that captures the replacement of physical capital accumulation by human capital accumulation as a prime engine of growth along the process of development. It argues that the positive impact of inequality on the growth process was reversed in this process. In early stages of the Industrial Revolution, when physical capital accumulation was the prime source of growth, inequality stimulated development by channelling resources towards individuals with a higher propensity to save. As human capital emerged as a growth engine, equality alleviated adverse effects of credit constraints on human capital accumulation, stimulating the growth process.

The importance of evolutionary forces for comparative economic performance across societies has been the focus of a vibrant literature, highlighting the roles played by the Neolithic Revolution and the prehistoric "out of Africa" migration of anatomically modern humans in generating worldwide variations in the composition of human traits. This essay provides an overview of the literature on the macrogenoeconomics of comparative development, underscoring the significance of evolutionary processes and of human population diversity in generating differential paths of economic development across societies. Furthermore, it examines the contribution of a recent hypothesis set forth by Nicholas Wade, regarding the evolutionary origins of comparative development, to this important line of research.

Despite the importance attributed to the effects of diversity on the stability and prosperity of nations, the origins of the uneven distribution of ethnic and cultural fragmentation across countries have been underexplored. Building on the role of deeply-rooted biogeographical forces in comparative development, this research empirically demonstrates that genetic diversity, predominantly determined during the prehistoric "out of Africa" migration of humans, is an underlying cause of various existing manifestations of ethnolinguistic heterogeneity. Further exploration of this uncharted territory may revolutionize the understanding of the effects of deeply-rooted factors on economic development and the composition of human capital across the globe.

This research argues that deep-rooted factors, determined tens of thousands of years ago, had a significant effect on the course of economic development from the dawn of human civilization to the contemporary era. It advances and empirically establishes the hypothesis that, in the course of the exodus of Homo sapiens out of Africa, variation in migratory distance from the cradle of humankind to various settlements across the globe affected genetic diversity and has had a long-lasting effect on the pattern of comparative economic development that is not captured by geographical, institutional, and cultural factors. In particular, the level of genetic diversity within a society is found to have a hump-shaped effect on development outcomes in both the pre-colonial and the modern era, reflecting the trade-off between the beneficial and the detrimental effects of diversity on productivity. While the intermediate level of genetic diversity prevalent among Asian and European populations has been conducive for development, the high degree of diversity among African populations and the low degree of diversity among Native American populations have been a detrimental force in the development of these regions.