通过集中与分散因素控制实现区域差异调控的思考

依据区域经济发展阶段S型曲线,对落后地区与发达地区区域差异变化趋势进行比较分析发现,区域差异演化呈现周期性循环的特点.通过历史与现实的比较,区域差异的影响因素可归结为集中因素和分散因素的相互作用,因此,在不同的经济发展阶段调控区域差异的手段也应不同,差异调控应当成为经济政策的目标.     

生态资本价值的计量

随着中国市场经济的快速发展,生态资本对经济可持续发展的重要性,越来越受到人们的关注。但生态资本准确的计量一直是个难题。本文首先对生态资本的概念进行了界定,然后分析了生态资本的价值构成,最后在此基础上提出了具体的计量方法,特别是对生态资本的服务价值的计量进行了定量分析。     

科技对农民增收贡献的实证研究——以苏州农村为例

本文首先应用苏州实际GNP、资本存量、劳动力的序列数据直观分析了农民收入的趋势和源泉．在此基础上应用C-D生产函数建立农民收入的计量经济学模型，并估计出各要素的边际产出弹性，随后进一步应用索洛余值法估计科技进步对农民收入增长的贡献．并对计量结果进行了简要的理论分析．并据此提出了相应的结论。     

Process R&;D and Product Line Deletion by a Multiproduct Monopolist

Relative to single-product firms, a multiproduct monopolist can internalize the negative externalities of its R&D investments (the ``cannibalization effect') in two ways: (1) To lower R&D investment for each product; and (2) To delete some of its product lines so as to enlarge the market size for the remaining lines. It is shown that line deletion is profitable if products are close substitutes. If products are not close substitutes, the multiproduct monopolist keeps all product lines and invests less in cost-reducing R&D than single-product firms engaging in Cournot competition with product differentiation. However, it invests more in R&D than single-product firms if there are significant economies of scope in R&D, or if the oligopolistic firms can cooperate in their R&D decisions.      

基于遗传算法的模糊控制器参数优化

针对非线性量化因子模糊控制器的参数对系统性能影响和参数间的相互制约,提出了一种基于遗传算法的参数整定与优化方法,并进行了仿真研究。仿真结果表明通过该方法寻优的系统具有更好的响应速度和控制精度；当对象结构或参数发生变化时,非线性量化因子模糊控制器可以重新整定参数,以保持良好的控制效果,具有很强的鲁棒性。     

Multinational firms, exclusivity, and backward linkages

How does the nature of contractual relationships between a multinational and its local suppliers affect backward linkages and welfare in the local industry? We address this question in a two-tier oligopoly model where a multinational transfers technology to its suppliers if they accept an exclusive contract that precludes them from serving its local rivals. Invited suppliers balance the benefits of gaining access to new technology and the derived demand of the multinational against the opportunity of selling to other local firms. Exclusivity reduces competition among local suppliers and can lower backward linkages and local welfare relative to autarky.     

添加生活垃圾利用陶瓷废料制造陶瓷透水砖的研究

添加生活垃圾利用陶瓷废料,在常规生产工艺下低成本制造高附加值的透水砖,探讨了生活垃圾添加量对砖性能的影响,提高生活垃圾添加量可以提高透水砖的抗折强度和致密度,但降低了砖的透水性能和吸水率。研究表明,生活垃圾在砖坯中起着相反的作用——成孔和熔剂,控制生活垃圾添加量在5%内,对陶瓷透水砖的透水性能影响不大。     

巴塞尔新资本协议与我国商业银行资本管理

文章探讨巴塞尔新资本协议与我国商业银行的资本管理问题。