This paper formalizes the commonsensical hypothesis that resource scarcity causes a large allocation of time and effort to appropriative competition. Our main innovation is to model explicitly the positive intertemporal effect of consumption on the probability of survival. The critical assumption is that this effect becomes stronger as resources become… (More)
Noel for helpful discussions. I wish to thank Miana Plesca for able research assistance. The usual disclaimer applies.
This paper addresses the following question: Does characterizing the state to be an agent of its citizens provide a useful " as if " framework for positive analysis of economic policy? Or, can we understand economic policy only by explicitly characterizing the state as proprietary, the instrument of the ruling elite?
This paper develops an economic theory of empire building. This theory addresses the choice among three strategies that empire builders historically have used. We call these strategies Uncoerced Annexation, Coerced Annexation, and Attempted Conquest. The theory yields hypotheses that relate the choice among these strategies to such factors as the economic… (More)
It is well known that the immune response in sheep against Brucella melitensis is subject to individual variation, depending on diverse factors. It bears asking whether these factors (e.g. clinical disease, active infection, state of previous immunity), when affecting a group, can cause variation in the performance of different diagnostic tests. To clarify… (More)
This paper analyses a general-equilibrium model of the complementarity between economic competition for the allegiance of subjects and military competition for the control of land. In our model economic competition between rival rulers for the allegiance of subjects results in their subjects, whether they are producers or soldiers, receiving incomes equal… (More)
In Jack Hirshleifer's one-factor model of anarchy agents use in appropriative competition the same resource that they are competing to appropriate. Analyzing this model we Þnd that equilibrium consumption is adequate for the viability of anarchy only if the decisiveness parameter of the technology of appropriation is small. For this reason Hirshleifer… (More)
This paper studies the appropriative aspect of the struggle for survival. We assume that, if resources are scarce, then the probability of survival is low and the appropriation of additional resources has a large effect on the probability of survival. Consequently, resource scarcity causes people to allocate a large amount of time and effort to… (More)
This work treats the 3D facial model reconstruction process based on range images, and focusing on image acquisition, register and integration. The document has a comprehensive analysis of the triangulation and structured light technique for range image acquisition. Also, it is proposed a new data point sampling mechanism for the image registering process,… (More)
This paper develops a theoretical model that is consistent with the observed prevalence of anarchy. In this model appropriative competition and the production of consumables are alternative uses of time and effort. The model implies that in an anarchic system the fraction of their time and effort that agents allocate to appropriative competition is an… (More)