发挥市场机制决定作用化解产能过剩——以江苏为例

本文利用生产函数法,实证测度江苏省产能利用情况,发现江苏省制造业产能过剩有进一步蔓延趋势。分行业类别看,产能过剩集中于重工制造业领域,而轻工业的产能过剩相对较少,且近半数轻工业行业存在一定程度的产能不足。从企业行为和市场与政府关系两个层面,提出了发挥市场机制决定性作用和更好发挥政府作用,共同化解产能过剩,促进江苏产业转型升级的政策建议。     

TFP growth in Chinese cities: The role of factor-intensity and industrial agglomeration

This article estimates agglomeration effects via calculating EG (Elilsion & Glaeser) and TFP growth (Total Factor Production) by considering the undesired output of the industrial enterprise database and the entropy weight method. Using panel data of 207 county-level cities in China and 28 two-digit manufacturing industries from 2003 to 2013 based on SIC codes, this paper analyzes the relationship between agglomeration and TFP growth through the smooth transition model under different regions and factor-intensity. The results are as follows. (1) A negative relationship appears in manufacturing productivity. The agglomeration effect changes to the crowded effect. Environmental pollution is also generated by transportation and inadequate pollution treatment technology. (2) The excessive agglomeration phenomenon of developed areas (eastern region) is less than the less developed areas (central and western regions). (3) Resource-intensity industries present two thresholds that indicate complex regional features. For various intensive industries in different regions, the relationship between GML and agglomeration is different. High agglomeration does not always promote TFP growth. (4) At different levels of urban industrial agglomeration, the influences of efficiency change and technical change on GML are different. Overall, moderate agglomeration in all regions helps promote economic development.     

Are house prices in South Africa really nonstationary? Evidence from SPSM-based panel KSS test with a Fourier function

This study applies the sequential panel selection method (SPSM) to investigate the time-series properties of provincial house prices for entire, large, medium and small middle-segments of South Africa. Quarterly time-series data were collected from nine provinces in South Africa for different house-size categories over the period of 1978.Q1 to 2012.Q4. Whereas other panel-based unit-root tests are joint tests of a unit root for all members of a panel and are incapable of determining the mix of integrated of order zero (I(0)) series and integrated of order one (I(1)) series in a panel setting, the SPSM proposed by Chortareas and Kapetanios (2009) can clearly identify how many and which series in the panel are stationary processes by classifying a whole panel into a group of stationary and nonstationary series. The empirical results from several panel-based, as well as standard pure time-series, unit-root tests, indicate that house prices for the nine provinces studied here are either stationary or nonstationary. However, results from the SPSM using the panel version of the Kapetanios et al. (KSS, 2003) test with a Fourier function unequivocally indicate that house prices are stationary for the nine provinces under study. Our test results have important economic and policy implications for South Africa.     

The Effect of Protest Votes on the Estimates of WTP for Use Values of Recreational Sites

Contingent valuation studies are often characterized by a considerable number of protest responses, which may cause selectivity bias on the final estimates for WTP. Sample selection models can detect and – if necessary – correct selectivity bias. In economic applications where the relevant dependent variable is continuous, sample selection models are generally estimated using Heckman's 2-step method rather than the FIML estimator. Either method has its own drawback: computational complexity for the FIML method, susceptibility to collinearity problems for the 2-step method. Using data on valuation of forest resources for recreational use, we analyse the performance of the two estimators. In this application, given the presence of some collinearity, the FIML is preferred to the 2-step method. A procedure is outlined to deal with selectivity problems in similar settings.     

基于实验与数学的匀速圆周运动向心力公式推导方法

本文运用观察实验和数学方法,给出了匀速圆周运动向心力公式的几种推导方法,以促进人们更加深刻地认识、理解和应用匀速圆周运动向心力。     

“设计陈述”也要设计——2010年上海世博会广西馆概念性策划方案的“设计陈述”剖析

工程项目设计不但要设计图纸,而且要设计“设计陈述”。以参加“2010年上海世博会广西馆概念性策划方案”的“设计陈述”为例,剖析如何通过设计演讲、标书、展板、光碟等多种“设计陈述”方式,积极促进工程项目业主及相关各方对项目方案设计图纸的理解与认可。“设计陈述”是完成设计工作不可或缺的一个重要组成部分,对进行设计沟通及实现设计价值影响颇深。     

天然气输销过程中的输差计算及其控制

结合燃气输销企业生产现场的实际情况，分析了输差产生的原因，给出了正确的统计方法并提出了合理的控制措施。     

海外项目质量控制方法探索与实践

随着中国石油工程技术服务企业在国际市场业务范围不断扩大,服务质量、产品质量在市场中地位和发挥的重要作用日显突出,同时在国际高端技术服务市场,国外公司在重视技术的同时更关注服务的品质和项目策划运行,重视项目的质量程控管理。本文旨在分析海外项目的管理特点、探索海外项目管理过程中质量控制体系与方法,为同行业提供海外国际项目质量控制管理方面的经验。     

项目教学法在《电工电子学》教学中的探讨

为了更好地提高学生学习的主动性和工程实践能力,文章提出在《电工电子学》课程教学中采用项目教学法,并对实施该教法的可行性以及实施该教法时的具体项目进行了探讨。     

饲草生产学教学方法的探讨

《饲草生产学》是草业科学专业重要的选修课程。在饲草生产学教学过程中,通过构建新的课程教学体系,加强课程条件建设,改进课程教学方法和教学手段,注重实践教学环节和学生能力的培养,调动学生学习的积极性,提高了教学质量。