Environmental Abatement and Intergenerational Distribution

This paper employs an overlapping-generations model to explore the impactof public abatement on private investment and the intergenerationaldistribution of welfare. Whereas public abatement benefits the oldestgenerations in terms of non-environmental welfare, future generations gainmost in terms of environment welfare. The overall benefits tend to besmallest for generations born at the time of the unanticipated policy shock.Public debt policy, however, can be employed to ensure that welfare gainsare distributed more equally across the various generations. Such a policyimplies that natural capital crowds-out man-made capital.     

Optimal Product Variety and Economic Growth: The Trade-off between Internal and External Economies of Scale

Received July 17, 2000; revised version received February 1, 2001     

论森林生态产品的外在性

文章运用现代经济学的外部性理论系统分析了森林生态产品外部性的表现形式。在分析森林生态产品外部性的特点和本质的基础上提出解决这种外部性的最佳途径是由政府提供森林生态产品这种公共产品。     

效率与公平兼顾的最优所得税:理论框架及最优税率估计

最优所得税主要探讨税收如何兼顾公平与效率问题,以及给定公平偏好程度下,如何确定最优边际税率水平。即使在崇尚罗尔斯社会福利函数的社会里,政府同时兼顾再分配和财政收入目标的基础上,只要略加考虑税收对劳动供给的效应,哪怕是微弱的考虑和兼顾,最高边际税率都不会达到100%。而且,借鉴斯特恩最优线性所得税模型及美国个人所得税制度,估计我国现行个人所得税最高边际税率还可以适当降低到36%左右。     

农地价值与农户福利补偿研究——以武汉市为例

本文引入C-D函数并概括地分析了20世纪90年代以来引致武汉市农地价值形成变化的各主体的主要投入,阐明了农户投入农地所应获得的贡献值与农户实际收入之间的差额,并据此估算了应给予农户的农地福利补偿,最后对有关结果进行了分析讨论。     

我国居民收入差距成因分析及对策探讨

随着我国国民经济的持续快速发展和收入水平的普遍提高,收入渠道的多元化促进了居民收入格局的多样化,带来了经济利益在不同群体间的重新调整和社会收入差距的加剧.居民收入差距在城乡、行业、地区之间的扩大,已成为阻碍社会经济持续发展的不利因素.因此,深入分析我国居民收入分配状况,寻找相应的对策,逐步缩小居民收入差距,更具迫切性和现实意义.     

The real effects of stock prices: learning,disclosure and corporate social responsibility

This paper develops a tractable model to study the impact of corporate social responsibility (CSR) on real decisions (i.e., production and disclosure decisions) of a firm which can learn from the stock price. Firms with high CSR disclose more precise information, improving the stock liquidity and price efficiency, which also benefit liquidity traders and consumers. Interventions by regulators in firms’ disclosure decisions, such as mandatory disclosure, can improve social welfare, but their effectiveness depends on the degree of CSR. We also discuss the implications of learning from the price.     

中国儿童福利观的历史演进——基于改革开放以来的儿童福利政策框架

改革开放30余年来,中国儿童福利政策框架逐渐完善,随着"儿童与福利"概念的提出,儿童福利逐渐成为了构建社会主义和谐社会的重大战略议题。文章探讨了改革开放以来我国儿童福利观的历史演进过程认为:儿童福利观是儿童福利制度建设、政策制定、内涵外延等内容的基础性思想来源,反之,儿童福利政策也对儿童福利观的主流思想的发展具有导向作用;儿童福利观具有时代性、动态性、融合性等特征;儿童福利政策尚待完善,儿童福利观仍需普及,形成具有综合性、全面性、先进性的儿童福利观对于发展中国的儿童福利事业有深远的意义。     

广义Stackelberg市场上企业横向兼并获利性研究

基于广义Stackelberg寡头垄断市场,研究企业横向兼并的获利性和社会福利问题。结果表明,一个领头企业与一个跟随企业之间总是存在兼并动机,而领头企业之间很少存在兼并动机;当边际生产成本的差异程度较大时,两个跟随企业之间总是存在兼并动机;兼并导致的企业利润增加是以社会福利下降为代价的。     

Tiebout's tale in spatial economies: Entrepreneurship, self-selection, and efficiency

This paper establishes the existence and efficiency of equilibrium in a local public goods economy with spatial structures by formalizing Hamilton's [Hamilton, B.W., 1975. Zoning and property taxation in a system of local governments Urban Studies 12, 205–211] elaboration of Tiebout's [Tiebout, C., 1956. A pure theory of local public expenditures. Journal of Political Economy 64, 416–424] tale. We use a well-known equilibrium concept from Rothschild and Stiglitz [Rothschild, M., Stiglitz, J.E., 1976. Equilibrium in competitive insurance markets: an essay on the economics of imperfect information. Quarterly Journal of Economics 40, 629–649] in a market with asymmetric information, and show that Hamilton's zoning policy plays an essential role in proving the existence and efficiency of equilibrium. We use an idealized large economy following Ellickson, Grodal, Scotchmer and Zame [Ellickson, B., Grodal, B., Scotchmer, S., Zame, W.R., 1999. Clubs and the market, Econometrica 67, 1185–1217] and Allouch, Conley and Wooders [Allouch, N., Conley, J.P., Wooders, M.H., The Tiebout Hypothesis: On the Existence of Pareto Efficient Competitive Equilibria, (2004), mimeograph]. Our theorem is directly applicable to the existence and efficiency of a discrete spatial approximation of mono- or multi-centric city equilibria in an urban economy with commuting time costs, even if we allow the existence of multiple qualities of (collective) residences, when externalities due to traffic congestion are not present.