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31.
Despite the evidence on incomplete financial markets and substantial risk being borne by innovators, current models of growth through creative destruction predominantly model innovators’ as risk neutral. Risk aversion is expected to reduce the incentive to innovate and we might fear that without insurance innovation completely disappears in the long run. The present paper introduces risk averse agents into an occupational choice model of endogenous growth in which insurance against failure to innovate is not available. We derive a clear negative relationship between the level of risk aversion and long run growth. Surprisingly, we show that in an equilibrium there exists a cut-off value of risk aversion below which the growth rate of the mass of innovators tends to a strictly positive constant. In this case, innovation persists on the long run and consumption per capita grows at a strictly positive rate. On the other hand, for levels of risk aversion above the cut-off value, the economy eventually stagnates. 相似文献
32.
This problem involves optimizing product collection and redistribution from production locations to a set of processing plants over a planning horizon. This horizon consists of several days, and the collection-redistribution is performed on a repeating daily basis. A single routing plan must be prepared for the whole horizon, taking into account the seasonal variations in the supply. We model the problem using a sequence of periods, each corresponding to a season. We propose an adaptive large-neighborhood search with several specifically designed operators and features. The results show the excellent performance of the algorithm in terms of solution quality and computational efficiency. 相似文献
33.
Federico Etro 《Journal of economic surveys》2014,28(5):804-830
Most market structures are neither perfectly or monopolistically competitive: they are characterized by a few large firms that are engaged in strategic interactions in their production and investment decisions and whose number is endogenous. The theory of endogenous market structures analyzes markets in partial and general equilibrium where strategies affect entry and entry affects strategies, and exogenous primitive conditions on technology and preferences affect the equilibrium. We discuss applications to industrial organization, international trade, business cycle theory, international finance, growth and implications for welfare and for competition, trade, fiscal and monetary policy. 相似文献
34.
《Review of Economic Dynamics》2014,17(4):707-725
Using the framework of Desmet and Rossi-Hansberg (forthcoming), we present a model of spatial takeoff that is calibrated using spatially-disaggregated occupational data for England in c. 1710. The model predicts changes in the spatial distribution of agricultural and manufacturing employment which match data for c. 1817 and 1861. The model also matches a number of aggregate changes that characterise the first industrial revolution. Using counterfactual geographical distributions, we show that the initial concentration of productivity can matter for whether and when an industrial takeoff occurs. Subsidies to innovation in either sector can bring forward the date of takeoff while subsidies to the use of land by manufacturing firms can significantly delay a takeoff because it decreases spatial concentration of activity. 相似文献
35.
李晓冬 《吉林省经济管理干部学院学报》2011,25(4):60-65
运用马克思经济学关于生产力决定生产关系的基本理论和杨小凯发展的斯密-科斯框架的交易费用理论分析所有权安排的演进的内生性决定因素,得出其结论:一种所有权安排是技术变迁和制度变迁相互作用的结果。用内生交易费用和外生交易费用分别来刻画一个特定时点上制度条件和技术条件的现实状况,说明一个时期的内生交易费用和外生交易费用的分布可以决定这个时期的所有权安排。 相似文献
36.
我国钢材期货和现货价格波动存在正相关性,即使价格短期出现分歧,但从长期来看也会趋向于一致;钢材期货表现出了一定的价格发现功能;上一期现货价格的波动会引起当期期货价格和现货价格的同方向变动,且影响远大于同期期货价格波动和前一期期货价格和现货价格波动的影响;钢材期货的上市不仅不是钢材现货市场价格大幅波动的原因,而且在一定程度上对现货价格的大幅波动起到了抑制作用.钢材期货的推出,无论是对涉钢企业规避价格风险,还是对钢材市场平稳发展及稳定钢材价格,都具有一定的积极意义. 相似文献
37.
Endogenous market structures and contract theory: Delegation, principal-agent contracts, screening, franchising and tying 总被引:2,自引:0,他引:2
Federico Etro 《European Economic Review》2011,(4):463-479
I study the role of unilateral strategic contracts for firms active in markets with price competition and endogenous entry. Traditional results change substantially when the market structure is endogenous rather than exogenous. They concern (1) contracts of managerial delegation to non-profit maximizers, (2) incentive principal-agent contracts in the presence of moral hazard on cost-reducing activities, (3) screening contracts in case of asymmetric information on the productivity of the managers, (4) vertical contracts of franchising in case of hold-up problems and (5) tying contracts by monopolists competing also in secondary markets. Firms use always these contracts to strengthen price competition and manage to obtain positive profits in spite of free entry. 相似文献
38.
货币发行量对CPI变动具有负的影响。当前中国CPI居高不下,长期以来,中国一直存在着货币增速超过CPI增速、货币政策对资产泡沫的估算和调节能力有限、通胀指标难以确定等问题,针对这些情况,我们应综合运用货币政策工具,保持货币信贷合理投放,加大金融支持经济发展方式转变和经济结构调整的力度。完善人民币汇率形成机制,采取"外堵内疏"的策略,遏制国际投机资本冲击国内金融市场。 相似文献
39.
以随机动态一般均衡模型作为基本分析框架,建立一个具有投资组合调整成本的小型开放经济实际经济周期(RBC)模型,在模型参数校准的基础上分析模型对中国经济波动典型化事实的模拟能力和方差分解效应,结果表明:小型开放经济RBC模型平均可以模拟大约80%以上的中国经济波动;技术冲击是造成中国产出和就业波动的主要因素。 相似文献
40.
近年来发达经济体出现了菲利普斯曲线平坦化现象,但有关中国的研究尚缺乏共识。本文基于实证和理论分析,系统研究了中国菲利普斯曲线的平坦化问题。首先,结合货币政策冲击和月度SVAR框架,发现通胀的响应程度在2010年后大幅下降。由于证据显示总需求曲线并未平坦化,因此通胀响应弱化可解读为菲利普斯曲线的平坦化。数据显示,菲利普斯曲线平坦化与生产率增长放缓同时发生,因此,本文在标准DSGE模型中引入纵向内生增长渠道,该渠道基于研发投入和知识资本积累,从而使生产率内生于经济周期。研究发现:(1)内生增长渠道放大了需求冲击对产出的影响,但缩小了需求冲击对通胀的影响;(2)内生增长渠道改变通胀和增长之间的替代关系,但不改变边际成本向通胀的传导。分段估计显示,2010年后,通胀和增长的关系弱化是边际成本传导变弱和内生增长渠道变强共同作用的结果。本文认为,由于菲利普斯曲线的平坦化,中央银行应继续坚持稳增长和就业优先战略,关注但不必过于担心由此引发的通胀压力。 相似文献