随机型连续盘点订货模型中供应链周期服务水平的波动和优化

对存在数量折扣和运费折扣的随机型连续盘点库存策略,进行了建模和分析,设计了供需双方合作的库存策略和订货策略,给出了理想的经济订货量和订货价格的甄选方法流程,模型确定了供应链理想的周期服务水平,证明了在该策略下,理想周期服务水平对于订货批量具有相对稳定性,并分析了此稳定性对供应链整体的重要意义,以及模型近似的合理性。在这个服务水平上,确定了再订货点和安全库存,并分析了该策略对供应链各方在管理措施方面的启示。利用该模型进行库存和订货决策,设计供应链合同,可以在不伤害服务水平的基础上,降低供应链总成本。     

Wealth inequality and collective action

We study the effect of inequality in the distribution of endowments of private inputs (e.g., land, wealth) that are complementary in production with collective inputs (e.g., contribution to public goods such as irrigation and extraction from common-property resources) on efficiency in a class of collective action problems. We focus on characterizing the joint surplus maximizing level of inequality, making due distinction between contributors and non-contributors, in a framework that allows us to consider a wide variety of collective action problems ranging from pure public goods to impure public goods to commons. We show that while efficiency increases with greater equality within the groups of contributors and non-contributors, so long the externalities (positive or negative) are significant, there is an optimal degree of inequality between these groups.     

Robust political economy

This paper introduces the idea of “robust political economy.” In the context of political economic systems, “robustness” refers to a political economic arrangement's ability to produce social welfare-enhancing outcomes in the face of deviations from ideal assumptions about individuals' motivations and information. Since standard assumptions about complete and perfect information, instantaneous market adjustment, perfect agent rationality, political actor benevolence, etc., rarely, if ever actually hold, a realistic picture and accurate assessment of the desirability of alternative political economic systems requires an analysis of alternative systems' robustness. The Mises-Hayek critique of socialism forms the foundation for investigations of robustness that relax ideal informational assumptions. The Buchanan-Tullock public choice approach complements this foundation in forming the basis for investigations of robustness that relax ideal motivational assumptions. JEL Code B53, P16, P26     

美国财政分权的效率分析

美国作为一个高度发达的市场经济国家,不但在经济发展领域里取得了令人瞩目的成就,而且在制度的设计、创新和发展等方面也有许多值得借鉴之处,美国财政分权体制就是其中之一.本文在分析财政分权效率的含义及要求的基础上,从美国政府问事权和财权划分明确且相互匹配、科学合理的转移支付制度、分权与制衡并存的预算机制、地方政府自治以及整个财政分权体制的法律依据等方面分析了美国财政分权高效的原因.     

服务业和制造业企业法人绩效比较

本文运用累积分布曲线分析经济普查数据发现,服务业和制造业企业法人相比,前者装备一个劳动力所需的资产量更多;前者的财务和经济效益比后者差;进入前者的投资门槛不比后者低。这些经验证据与大量理论和政策分析中的流行认识存在巨大反差。本文的经验发现提醒我们:在目前国情之下,大量资金投入服务业(尤其是生产性服务业和现代服务业)企业的机会成本,大于投入制造业企业的机会成本。所以,服务业发展应该分门别类、实事求是地推进。把发展服务业作为产业结构“升级”和经济增长方式转变重要途径的看法,也需要进一步深入分析。     

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.     

Local governance and public goods provision in rural China

In developing countries, identifying the most effective community-level governance mode is a key issue in rural development; therefore, empirical evaluation of these different modes is desperately needed. Since the 1980s, tens of thousands of villages in rural China have held local government elections, providing a good opportunity to investigate the effect of democratization on the level of public goods provision. Using a recent village survey conducted over a significant period of time, this article compares two different governance modes. It finds that elections affect little on the size of revenue but significantly shift the distribution of taxation from individuals to enterprises if possible. However, privatization has made taxation or levies on rural enterprises more difficult. It also shows that elections and power sharing are conducive to improve the allocation of public expenditures.     

论农村公共财政建设的制度环境与模式选择

公共品的层次性、成本补偿原理、均等化以及民主决策理论等是中国农村公共财政建设的一般理论基础。而农村经济制度、经济水平和结构、意识形态、民主水平等构成我国农村公共财政模式选择的现实制约条件。中国农村公共财政应是公共品供给体制上的分级财政、筹资体制上的向内倾斜型财政、决策体制上的民主型财政、管理体制上的法制型财政和反映农村社会经济变化的动态发展型财政。     

基层财政解困:一个财政体制变迁的分析框架

基层财政困难已影响到部分地方经济发展与社会稳定,是迫切需要解决的问题.基层财政陷入困境的最直接根源是财政体制不规范,事权与财权高度不对称.解困的根本出路在于规范政府间财政关系,进行财政体制创新.但财政体制变迁不能局限于边际微调,须考虑政府财政级次问题.本文提出推行"省管县"体制与撤消乡镇级政府两项改革,将政府层级由五级简化为三级,对应形成三级财政.并以这三级财政为架构,重新设计财政体制,合理配置政府间事权财权,以推动基层财政彻底解困.     

Regulatory and environmental effects on public transit efficiency: a mixed DEA-SFA approach

This paper assesses the impact of regulatory and environmental factors and statistical noise on the efficiency of public transit systems within a DEA-based framework. Using a panel of Italian companies, we implement a DEA-SFA mixed approach based on [H.O. Fried et al. (2002) Journal of Productivity Analysis, 17(1–2), 157–174] to decompose DEA inefficiency measures into three components: exogenous effects, managerial inefficiency and stochastic events. Besides providing evidence on the determinants of input-specific efficiency differentials across companies, the results point out that managerial skills play a minor role, and emphasize the relevance of regulatory policies aimed at replacing cost-plus subsidization with high-powered incentive contracts as well as improving environmental conditions of public transit networks.