Economics and underdetermination: a case study of urban land and housing economics

Underdetermination, associated with the Duhem–Quine thesis,is a familiar if under-researched theme in economics. In thelight of this, we examine the development of urban land andhousing economics. Through its Cartesian dualistic delineationof theory and data, the contemporary mainstream approach appearsunable to circumvent the problem of underdetermination. In effect,it employs the strong version of Duhem–Quine in its retentionof the assumption of a single, unitary competitive market (andassociated access–space trade-off). Conversely, we highlightthe affinity of Ely's (and the later Columbia School's) approachto pragmatists Dewey and Peirce, which provides a more fruitfulbasis for explanation.     

Polyhedral Combinatorics in Combinatorial Optimization

Polyhedral combinatorics is a subarea of combinatorial optimization of increasing practical importance. It deals with the application of the theory of linear systems and linear algebra to combinatorial problems. The paper is not intended as a survey on polyhedral combinatorics but it reviews some of the main concepts and proof techniques.     

西方城市化理论二元结构分析框架:一个文献综述

在发展经济学中，西方城市化理论可以被划分为两类：一是从经济结构转换的视角研究人口流动的二元经济结构理论；二是从区域发展的视角研究空间过程的二元区域结构理论。将两者结合起来对其进行文献综述。     

农村剩余劳动力转移的理论、现状与政策建议

文章在论述农村剩余劳动力转移相关理论的基础上,阐述了我国农村剩余劳动力转移的现状,并提出相关的政策建议,倡导城镇化及发展劳动密集的第三产业,为农村剩余劳动力转移提供就业岗位。     

中国劳动力市场的二元分割及其就业效应

我国的劳动力市场既有经济转型时期的非规范性，又有发展中国家二元经济和二元社会结构的特征，存在二元四级分割的情况。运用哈里斯-托达罗模型及成本-收益分析方法，可以考察我国二元四级市场上的劳动力流动状况及其就业效应。     

重庆经济结构存在的矛盾与对策

重庆市与西部的多数省区一样,经济发展面临着特有的结构性难题,主要包括三次产业结构矛盾、工业内部结构矛盾、区域经济结构矛盾和城乡"二元经济"结构矛盾等.应尽快优化、提升产业结构,并努力实现区域经济、城乡经济的协调、健康发展.     

加快重庆新型工业化进程的思考

重庆工业化具有跳跃式发展的基本特征，导致了其工业化与城市化进程分离，形成了明显的二元经济结构。重庆应按照新型工业化道路要求，加快工业结构的战略调整，加快农村工业化、城镇化步伐，消除二元经济结构，并大力推进工业增长方式转变．提高工业科技水平。     

二元经济理论模型评述

大多数经济学家认为,发展中国家的经济结构具有二元的性质,即现代城市部门与传统乡村农业部门并存,并据此形成了二元经济结构发展模型,以解释经济发展过程中的城乡工农关系以及二元经济向一元经济的转换。文章对四个主要的二元经济模型进行了综述,并深入探讨了模型所体现的经济思想和政策含义,以期为解决中国实际问题提供新的思路。     

Efficiency measurement with multiple outputs and multiple inputs

This paper discusses modeling technical and allocative inefficiencies in both cost minimizing and profit maximizing frameworks with special emphasis on multiple inputs and multiple outputs. Both primal and dual models are considered for this purpose. In the primal approach we use a separable output and input function (the constant elasticity of transformation output function and Cobb-Douglas input function). The dual models assume translog cost or profit functions. Technical inefficiency is assumed to be random in the cross-sectional models, and fixed firm-specific parameter in the panel data models. Allocative inefficiencies are always treated as input-specific parameters. We derive exact relations linking technical inefficiency and allocative inefficiencies to cost and profit when the underlying technology is represented by a flexible functional form such as the translog. It is shown that appending a one-sided homoscedastic error term to model technical inefficiency, or neglecting technical inefficiency altogether in a translog profit tunciton results in model misspecification and inconsistent parameter estimates.     

农业自然资源与食物生产的类型迭置分析—以福建省为例

福建省粮食缺口逐年拉大,其它副食品也出现程度不同的短缺信号。在食物短缺的背后隐含着农业自然资源数量的短缺,并且随着人口的增长而日益严重。本文从农业自然资源与食物生产的内在联系入手,尝试对其丰乏程度进行定量的地域划分和迭置分析,进而探索各地域类型的食物发展方向与总体对策。