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Optimal investments with convex-concave revenue: a focus-node distinction

机译:具有凸凹收入的最优投资:焦点节点的区别

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摘要

This paper considers a capital accumulation model in which revenue is a convex-concave function of the capital stock. While for certain capital values increasing returns to scale are reasonable, usually this property does not hold in general. In particular for large capital stock values it becomes increasingly difficult and thus expensive to produce more and more because of limitations of resources or infrastructure, lack of trained personnel in the region, etc. We give a complete classification under which parameter constellations a saddle point equilibrium is optimal, when it is optimal to close down by choosing zero investment and when history dependent equilibria occur. In the last scenario we distinguish between different types of the unstable equilibrium, which can each have their own implication for the firm's investment policy.
机译:本文考虑一种资本积累模型,其中收入是资本存量的凸凹函数。虽然对于某些资本价值而言,增加规模收益是合理的,但通常该财产通常不成立。特别是对于大的资本存货价值,由于资源或基础设施的限制,该地区缺乏受过训练的人员等,因此变得越来越困难,因此生产越来越昂贵。我们给出了一个完整的分类,在该分类下参数群是鞍点均衡当通过选择零投资来关闭资产的最优选择以及发生与历史有关的均衡时,则为最优。在最后一种情况下,我们区分了不稳定均衡的不同类型,每种不稳定均衡对公司的投资政策都有各自的影响。

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