A network market is a market in which the benefit each consumer derives from a good is an increasing function of the number of consumers who own the same or similar goods. A major obstacle that plagues the introduction of a network good is the ability to reach critical mass, namely, the minimum...

Considering a pure coordination game with a large number of equivalent equilibria, we argue, first, that a focal point that is itself not a Nash equilibrium and is Pareto dominated by all Nash equilibria, may attract the players' choices. Second, we argue that such a non-equilibrium focal point...

The standard evolutionary explanation for depression is that being emotionally depressed is adaptive. We argue that being depressed is not adaptive (indeed, quite the opposite), but that the threat of depression for bad outcomes and the promise of pleasure for good outcomes are adaptive because...

What became the post-War era’s “less developed countries” (LDCs) varied enormously in their pre- modern or pre-industrial economic conditions. We hypothesize that if these countries are arrayed on a continuum of pre-industrial development such as that of the demographer Ester Boserup,...

We study the idea that seemingly unrelated behavioral biases can coevolve if they jointly compensate for the errors that any one of them would give rise to in isolation. We suggest that the "endowment effect" and the "winner's curse" could have jointly survived natural selection together. We...

This research advances an evolutionary theory and provides empirical evidence that shed new light on the origins of contemporary differences in life expectancy across countries. The theory suggests that social, economic and environmental changes that were associated with the Neolithic Revolution...

This research develops an evolutionary growth theory that captures the intricate time path of life expectancy in the process of development, shedding new light on the origin of the remarkable rise in life expectancy since the Agricultural Revolution. The theory argues that social, economic and...