At each age an organism produces energy by foraging and allocates this energy among reproduction, survival, growth, and intergenerational transfers. We characterize the optimal set of allocation decisions that maximizes reproductive fitness. Time preference (the discount rate) is derived from...

Firm- and plant-level empirical studies typically find that trade liberalization squeezes price-cost margins among import-competing firms, that this heightened competitive pressure induces productivity gains among these same firms, and that further efficiency gains come from market share...

This research suggests that a Darwinian evolution of entrepreneurial spirit played a significant role in the process of economic development and the dynamics of inequality within and across societies. The study argues that entrepreneurial spirit evolved non-monotonically in the course of human...

Cultural transmission arguably plays an important role in the determination of many fundamental preference traits (e.g., discounting, risk aversion and altruism) and most cultural traits, social norms, and ideological tenets ( e.g., attitudes towards family and fertility practices, and attitudes...

This paper documents the speed of evolution (or lack thereof) of a range of values and beliefs of different generations of US immigrants, and interprets the evidence in the light of a model of socialization and identity choice. Convergence to the norm differs greatly across cultural attitudes....

In a model of evolution driven by conflict between societies more powerful states have an advantage. When the influence of outsiders is small we show that this results in a tendency to hegemony. In a simple example in which institutions differ in their "exclusiveness" we find that these...

This paper examines the consequences of initial periods of churning,' floundering about,' or mobility' in the labor market to help assess whether faster transitions to stable employment relationships--such as those envisioned by advocates of school-to-work programs--would be likely to lead to...

This paper studies the impact that capital market imperfections have on the natural" selection of the most efficient firms by estimating the effect of the pre-deregulation level of" leverage on the survival of trucking firms after the Carter deregulation. Highly leveraged" carriers are less...

Recently, a large number of countries have undertaken major reforms that have led to a large increase in the number of new enterprises. After these reforms, however, it has taken a number of years before output and productivity have begun to grow. The thesis of this paper is that the process of...