Income and substitution effects of fiscal policy on work effort

The focus of this paper is twofold. First, it examines the impact on work effort of changes in government purchases financed with lump‐sum taxes, in a neoclassical framework, with respect to four industrialised countries. Second, it reconsiders the expenditure–work effort relationship in a broader conceptual context that allows for distortionary taxation and a disaggregation of the income and substitution effects. Our findings are shown to cast doubt on the empirical plausibility of the prevailing (neoclassical and New Keynesian) models which seem to rely heavily on the lump‐sum tax notion, thus ignoring the substitution effects of distortionary taxation.     

Learning-by-doing and input demand of a rate-of-return regulated firm

The significance of learning by doing to input demand of a cost-minimizing rate-of-return-regulated firm is examined. Using a panel data, the results indicate that the firm's cost and input demand decisions are both influenced by learning-by-doing. The firm's cost and the rate-base (capital) input requirements decline as learning-by-doing measured by cumulative production expands. However, LBD may have different effects on the non-rate-base inputs (labor and fuel) considered in this study. While LBD ambiguously reduces fuel usage, it moderately increases labor employment. In addition to changing input intensity, LBD also influences returns to scale and elasticity of substitution.     

供应同一产品的两个销售商的库存决策研究

模型假设两个销售商销售同一产品，因此当一个销售商缺货时，它的客户可能转向另一个销售商购买同样的产品，即他们之间存在替代性。针对两个销售商的这种关系，给出了三种不同的库存决策。并对模型进行了实际算例分析，比较了两个决策者不同合作模式下的订货策略，为决策者制定有效的订货策略提供了依据。     

The Morishima gross elasticity of substitution

We show that the Hotelling–Lau elasticity of substitution, an extension of the Allen–Uzawa elasticity to allow for optimal output-quantity (or utility) responses to changes in factor prices, inherits all of the failings of the Allen–Uzawa elasticity identified by Blackorby and Russell [(1989) Am Econ Rev 79: 882–888]. An analogous extension of the Morishima elasticity of substitution to allow for output quantity changes preserves the salient properties of the original Hicksian notion of elasticity of substitution. We thank Paolo Bertoletti for drawing our attention to the issue addressed in this paper and for his comments on an earlier draft.     

2006年诺贝尔经济学奖得主菲尔普斯理论述评

本文介绍了2006年诺贝尔经济学奖得主埃德蒙·菲尔普斯的主要理论贡献。他在宏观经济政策跨期权衡分析、“黄金律”与经济增长、宏观经济政策的“短期—长期”分析、“自然率”、构建宏观经济学的微观基础,以及结构性萧条与繁荣等诸多领域进行了开创性的研究。菲尔普斯的理论和主张对西方经济理论和经济政策的研究都有十分重大的影响,对我国宏观经济问题和政策的研究有一定借鉴意义。     

Evaluating Projects and Assessing Sustainable Development in Imperfect Economies

We are interested in three related questions:(1) How should accounting prices be estimated?(2) How should we evaluate policy change in animperfect economy? (3) How can we check whetherintergenerational well-being will be sustainedalong a projected economic programme? We do notpresume that the economy is convex, nor do weassume that the government optimizes on behalfof its citizens. We show that the same set ofaccounting prices should be used both forpolicy evaluation and for assessing whether ornot intergenerational welfare along a giveneconomic path will be sustained. We also showthat a comprehensive measure of wealth,computed in terms of the accounting prices, canbe used as an index for problems (2) and (3)above. The remainder of the paper is concernedwith rules for estimating the accounting pricesof several specific environmental naturalresources, transacted in a few well knowneconomic institutions.     

Intertemporal Equity and Efficient Allocation of Resources

Competitive paths which are efficient are shown to satisfy a terminal cost minimization condition, thereby providing a continuous-time counterpart to the discrete-time result due to Malinvaud. Using this result, competitive paths which are equitable and efficient are shown to satisfy Hartwick's investment rule, which states that the value of net investment is zero at each date. Our result indicates that Hartwick's rule can help to signal inefficiency of competitive equitable paths. Journal of Economic Literature Classification Numbers: C61, D90, O41.     

论"物料代用"

本文主要对组织生产经营过程中的物料分类、物料代用原则、物料代用和禁止代用情况、代用方式、代用程序及流程以及代用效果评价和信息反馈等进行了探讨，以适应信息化物料管理系统的需要，确保物料使用的经济性、易得性及产品质量的满足。     

非农投资总量、结构和要素替代对就业的影响

将影响非农产业就业量的增长因素分解为:投资总量效应、结构变化效应和要素替代效应;投资总量的增长是拉动非农就业增长的主要力量,投资的行业结构变化效应以及要素替代效应导致了非农就业的下降。     

土地政策改革时期的城市空间发展:北京的实证分析

论文探讨北京城市空间发展的特征、并探究空间发展的特征与正在发展壮大的土地市场和土地制度改革之间的关系.利用1993年到2000年上半年北京城市建设区土地使用权出让数据,实证分析显示土地价格及土地开发密度都随着距城市中心区的距离增加呈下降趋势.实证分析还表明地租的曲线的空间变化与土地使用类型相关.这些实证证据支持如下结论:正在形成的土地市场确实影响城市土地开发和空间形态.实证分析还显示地租曲线的斜率和土地-资本替代弹性系数都随着时间的推移而变化.正如城市经济理论所预测,地租曲线斜率的下降是由于北京大量的交通投资降低了交通成本,从而又反过来使城市土地地租空间变化曲线发生旋转.土地-资本替代弹性指数的增加意味着价格影响土地开发密度.这两者的变化都反映出北京的土地市场正走向成熟.应该指出,在土地市场之外(在行政划拨的土地上)进行的大量开发对北京正在形成和发育的土地市场会产生扭曲.