Impact of modern communication infrastructure on productivity,production structure and factor demands of US industries: Impact revisited

This study investigates the contribution of modern communication infrastructure characterized by high speed broadband access network on the productivity growth, production structure and factor demands for US industries and for the aggregate economy. To evaluate such contribution, we modify the traditional cost function by incorporating communication infrastructure as input in production process in conjunction with other public infrastructures. The network externality and spillover effect of broadband access technology are captured by introducing broadband penetration rate as a shift factor in industry level production function. Empirical results show that the increased use of modern communications infrastructure increases the productivity of all industries with wide variations across industries. Estimated impacts on input demands show that increase in use of communications infrastructure service saves labor and materials and increase the demand for private capital. Finally, aggregate social rate of return on such investment has been estimated for policy implications.     

开放经济下中国新凯恩斯混合菲利普斯曲线

本文采用广义矩方法估计开放经济下中国新凯恩斯混合菲利普斯曲线，结合中国现实选择工具变量。结果表明，使用混合成本作为通货膨胀的驱动因素在统计和经济意义上具有显著性，影响我国通货膨胀主要是资本成本与进口中间品成本；厂商定价行为既有前瞻性又有后顾性，但前瞻性处于主导地位，且价格具有较强的灵活性。     

应该用哪一个模型来描述中国货币市场利率的动态变化

本文论证了双曲模型是描述中国货币市场利率动态变化的最佳单因子利率模型。由极大似然估计可以得到单因子利率模型的边际密度函数。双曲模型的边际密度和非参数估计得到的边际密度函数拟合较好，其表现远远优于几个常见的利率模型（CIR、CKLS和AG模型）。与较一般的Ait-Sahalia模型相比差别很小，但参数形式得到简化，似然比检验也支持这一点。双曲模型在刻画利率的均值回复特征方面还克服了AG模型的不足。     

公共资本生产率的比较研究——基于长三角21城市公共资本边际生产率的实证分析

近10年来长三角的政府公共投资（分配）过多地流向了上海、苏州、杭州、南京等核心城市，使这些城市的人均公共资本拥有量大幅上升，从而引发了其边际生产率递减情况的发生。但它们的资本利用效率或技术创新水平没有明显提升（或下降），不足以抵消其资本边际生产率下降的趋势。对这些大城市的经济发展来说，公共投资对其经济增长的意义已经在数量上表现得不明显，但对正处于经济快速增长期且资本边际生产率呈递增态势的长三角外缘中小城市而言，公共投资却有着积极意义。     

联产品协同生产的成本驱动实证研究

实证研究证明，联产品生产的协同作用也是产品成本的驱动因素。协同成本的动因在于联产品的组成变量。在联产品协同生产过程中，所采取的基于非线性成本函数的边际成本计算法，应该是数理依据严谨、实务应用可行的方法。     

个人教育投资的均衡分析

人力资本投资的关键形式是教育投资。文章认为,个人教育投资的均衡条件是边际成本等于边际收益。因为个人教育投资的边际成本递增,边际收益递减,所以必须采取多种措施刺激个人教育投资的积极性,才能促进我国教育事业的大发展。     

Regulators’ and stakeholders’ perspectives in a framework for bioenergy development

In this study, ten bioenergy crop rotations (corn, corn-stover, sorghum, soybean, corn-soybean, corn-soybean-canola, corn-stover-soybean, miscanthus, switchgrass, and sorghum-soybean) were selected based on local stakeholder (economically motivated) and regulator (environmentally motivated) preferences. These crops were implemented on diverse landscapes (agricultural, marginal, and agricultural plus marginal lands) one at time for 17 years using a SWAT model of the Saginaw River Watershed in Michigan. The bioenergy crops were evaluated based on 100 percent, 50 percent, and zero percent weight assigned to both stakeholders’ and regulators’ preferences using analytic hierarchy process (AHP), an optimization and decision-making technique that aims to satisfy multiple conflicting objectives. The corn-soybean-canola rotation was selected in all landscapes based on economic benefits (stakeholders’ preferences). Meanwhile, perennial grasses (miscanthus and switchgrass) were selected based on environmental benefits (regulators’ preferences), because they maintain permanent cover, require fewer inputs than traditional row crops, and are less management intensive. When implementing bioenergy crops on marginal lands, pollution generation greatly increased at the field level, indicating that these lands are likely not viable for bioenergy crop production to meet potential future renewable energy demand.     

Exchange rate,marginal q and investment behaviour of small and medium-sized enterprises in Japan: time series evidence of manufacturing industries

In this article, we investigate Granger’s causality among the exchange rate, Tobin’s marginal q and investment-capital ratio with quarterly data on firms categorized as small and medium-sized enterprises (SMEs) in Japan. We utilize the data of the following industries: chemical, iron and steel, production machinery, electric machinery and equipment, automobile and accessories and all manufacturing. The empirical results we obtain show that the null hypotheses of no Granger’s causality from the exchange rate to other variables, investment and marginal q, are accepted in all industries. The reason is the lower percentage of export by SMEs. Thus, it is considered that the effects of Abenomics on SMEs are limited, and that other kinds of reflation measures for SMEs are needed.     

我国铁路基础设施噪声的边际成本定价方法研究

通过概述国内外学者关于运输外部性内部化政策、运输外部性评估、运输外部成本计算方法等方面的研究成果,阐述了美国及欧盟寻求实现运输外部成本内部化的政策和方法。针对我国铁路基础设施噪声污染问题,在分析铁路噪声的产生、传播及估算的基础上,研究提出利用边际成本定价方法计算铁路噪声边际成本。噪声定价方法还有支付意愿法、冲击路径法等,这些定价方法及其实证量化还有待进一步深入研究。     

国际碳排放权交易价格决定与最优出口规模研究

本文分析了总量控制和交易、基准排放和信用两种碳排放权交易体系中的价格决定原理,并以边际减排成本等于市场均衡价格为基础,分析《京都议定书》框架下国际碳排放权交易规模和利益分配不公等情况;然后构建两阶段模型,讨论“非附件B国家”碳排放权出口规模的决定因素及其影响效应,并通过估测中国碳排放权出口规模决定因素的函数值或参数值,计算中国第1承诺期的最优出口量;最后提出中国参与国际碳排放权交易的政策建议。