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"The Prisoner's Dilemma is a typical structure of interaction in human societies. In spite of a long tradition dealing with the matter from different perspectives, the emergence of cooperation or defection still remains a controversial issue from both an empirical and a theoretical point of view. In this paper we propose a local interaction model with endogenous network formation, in the attempt to provide a reasonable account of emerging behaviors. A population of boundedly rational agents repeatedly chooses to cooperate or defect. Each agent's action affects only her interacting mates, according to a network of re-lationships. Agents are randomly given the possibility to substitute undesired mates with unknown ones. Full cooperation, full defection and coexistence of both cooperation and defection in homogeneous clusters are possible outcomes of the model. Computer-based simulations are applied to investigate under what circumstances either case is most likely." [author's abstract]

Abstract
In this paper we analyse how the distribution of land property rights affects industrial takeoff and aggregate income through its impact on effective demand. We apply a modified version of the model provided in Murphy et al. (1989, QJE) which allows us to analyse the role of land distribution when it is independent of the distribution of firm ownership. We extend the result of Murphy et al. (1989, QJE) by showing that industrialization and income depend non-monotonically on the distribution of land and by demonstrating that this result is due to the way land distribution affects the distribution of profits among firms. Moreover, we show that there may be a tradeoff between industrialization and income, the latter being associated with a distribution of land which is more equal than that associated with maximum industrialization.

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