产业集聚效应的系统动力学模型研究

以系统动力学理论为基础，结合产业集聚效应的正反馈特征，对人才流、技术流、资金流和市场流的因果关系进行了探讨。通过产业集聚效应衡量方法的比较，构建系统动力学模型，分析制约产业集聚效应发挥的主要因素，提出加强政府投资力度、发挥市场机制作用和提高企业整体能力的建议。     

Unemployment dynamics in an OLG economy with public pensions

Pension benefits in old age establish a disincentive to save in youth, thereby yielding lower levels of capital stock and the wage rate. As a result, the trade union has an incentive to change the composition of its two targets: employment and the wage rate. This paper develops a model that includes employment effects of public pensions via capital accumulation and union wage setting. Within this framework, we consider how contribution rates to the pension system influence the level and time path of the unemployment rate. It is demonstrated that (1) a higher contribution rate results in a lower unemployment rate, and (2) the economy with a high (low) contribution rate experiences monotone convergence towards (oscillatory convergence towards or a period-2 cycle around) the steady state. The author would like to thank an anonymous referee, Kazutoshi Miyazawa, and seminar participants at Osaka University for their useful comments and suggestions, and Masako Ikefuji and Hiroaki Yamagami for their research assistance. Financial support from the Japan Society for the Promotion of Science (JSPS) through a Grant-in-Aid for Young Scientists (B) (No.17730131), the Asahi Glass Foundation, the Japan Economic Research Foundation and the 21st Century COE Program (Osaka University) is gratefully acknowledged. All remaining errors are mine.     

也谈价值、分配等问题--与程恩富、汪桂进两位先生商榷

现实中的价值分配与价值创造相关,主张价值分配与价值创造无关是不正确的;社会主义市场经济中劳动者的资本收入具有劳动收入的性质,以为资本创造价值或者资本收入是非劳收入是不正确的;现阶段的按要素分配只是分配的表现形式,其实质则是按劳分配。     

对马克思按分配原则的反思

马克思的劳动价值论不仅是剩余价值的理论基础和分析资本主义分配的理论依据，同时也是马克思设想的社会主义按劳分配的逻辑起点。只是以往我们对按劳分配原则的最本质的含义理解不够透彻。实质上，应该说马克思设想的按劳分配原则最本质的内容包括三点，即在未来的社会主义社会中，个人消费品的分配以劳动量的大小为依据，等量劳动获取等量报酬，承认能力本位。在社会主义市场经济条件下的按劳分配原则，仍然没有偏离这三点本质的含义，但已经有了新的特点和形式。     

Ecological Transfers in Non-Human Communities Parallel Economic Markets in a General Equilibrium Ecosystem Model

Synopsis: The oft-cited analogies between ecological and economic systems are exploited to develop a many-species model of population dynamics. In economies, markets are the fundamental institutions in which the interaction of demands and supplies determine the quantities and prices of goods. However, economic markets are not appropriate for ecological communities, because markets rely on voluntary exchange, whereas plants and animals engage in involuntary transfers of biomass. A properly defined counterpart to markets based on biomass transfers permits a general equilibrium model of predator/prey and competitive interactions in a many-species community. Functional response from optimal foraging and predation risk provide the demand and supply, respectively, in the biomass transfers. Energy per unit time is scarce and predators and prey make optimum choices with respect to functional response and risk avoidance based on required energy expenditures. The energy expenditures are similar to economic prices: they determine foraging strategies and are beyond the control of the predators and prey, yet they are determined by the aggregate choices of all predators and prey and by population densities. The energies acquired from foraging are used in a new way to construct difference equations that determine the population dynamics. This revised version was published online in July 2006 with corrections to the Cover Date.     

The British low-wage sector and the employment prospects of the unemployed

Are low wages a way for the unemployed to switch to higher-paying jobs? Using data from the British Household Panel Survey, the labour market dynamics of unemployed, low-paid and higher-paid employed men are analysed. Moreover, the respective (un)employment duration and occupational skill level are accounted for. Results show that in general low wages significantly reduce the risk of future unemployment and increase the chances of ascending the salary ladder, especially in the case of long-term unemployment (>360 days). Furthermore, the occupational skill level has a substantial influence on the upward mobility of low-paid jobs: individuals working in the initial period in a low-paid and higher-skilled occupation have on average an 11 percentage points higher probability of entering higher pay compared to when working in a low-paid and low-skilled occupation.     

中国劳动力市场户籍分割与企业人力资本投资的作用

我们运用2004年中国9省(市)企业员工培训和继续学习调查数据,验证中国劳动力市场存在户籍分割,并分析企业人力资本投资,即在职培训对处于不同层次劳动力市场的员工收入增长、职业发展的影响。得出以下结论：(1)中国存在由户籍制度造成的劳动力市场分割特征,农民工主要处于次要劳动力市场。(2)户籍对于员工参与企业在职培训以及培训的收益率都有显著影响；在其他条件相同情况下,城镇户籍员工比农民工的在职培训参与率和收益率都显著更高。(3)在职培训对于提高农民工收入具有显著的正的影响。(4)此前培训(进入本单位前接受的培训)对于农民工进入主要劳动力市场具有显著作用。     

企业现金流转系统动态仿真研究

本文运用系统动力学方法分析了企业现金流转问题的基本特征。针对一特定民营企业建立了企业现金流转的系统动力模型，并在此基础上，设计四种仿真方案模拟了不同条件下企业现金流转的具体情况，以期为企业现金流以及企业的持续经营做一些有益的探索。     

西部农村劳动力转移途径与对策

从西部的实际出发,借鉴发达国家农村剩余劳动力转移的成功经验,提出西部农村劳动力转移要发展农业产业化,促进农村劳动力在农业内部吸纳和农村内部转移;加快西部工业化进程,以产业发展带动就业;推进城镇化进程,以企业集聚带动人口集聚的途径与对策.     

北京市各区县劳动力产业分布比较优势统计分析

北京市各区县劳动力总量分布的产业差别是明显的,其分布是有规律可循的.因此,对于北京市各区县功能区的划分可以站在劳动力产业分布比较优势的角度,采用统计分析的方法,深入分析北京市已经形成的劳动力产业分布规律,从而为城市功能区的划分提供劳动力布局的依据.