我国房地产市场调控政策效果比较——基于动态随机一般均衡的视角

结合内含房地产的NK-DSGE模型,通过脉冲响应函数,比较了限购、增加土地供给以及调整抵押约束机制对于房地产市场的调控效果。研究表明:限购政策引起产出与实际房价最大幅度的下降,因而在房价快速上涨的背景下,政策需要在稳定房价与产出之间权衡;增加土地供给的政策不会引起产出的下降但对于实际房价的影响相对较小;调整贷款价值比的政策引致产出与实际房价下降,但其影响小于限购政策。社会福利估算的结果指出,限购政策对应的社会福利水平最低,而调整贷款价值比的政策具有较高的社会福利水平。因此,基于社会福利考虑,调整贷款价值比的政策具有相对较好的效果。     

欧拉法与Matlab数值求解

欧拉法在常微分方程近似数值求解,特别是理论分析中占有很重要的地位,本文通过Matlab的平台,显示执行欧拉法各步骤的细节。由于数学软件Matlab自身不带有欧拉法执行程序,笔者编写了三个欧拉法计算程序,以满足常微分方程近似数值求解和理论分析的需要。     

从利益共同体到命运共同体:地方政府隐性债务的合作治理

在地方政府性债务的治理中,隐性债务因其增长迅速、规模不清和风险不确定,成为未来债务治理的重点和难点。隐性债务挟裹主体众多,关联利益甚广,因此,基于共同体视角,明确治理主体,有利于化解风险。在隐性债务生产阶段,因利而合的共同体大肆攫取利益导致隐性债务激增;在债务风险凸显阶段,利益共同体的本能选择不是"安危与共",而是"大难临头各自保"。但债务风险的"飞去来器效应"和群体性焦虑,将促使利益共同体走向命运共同体。命运共同体既是利益共同体,更是治理共同体。在隐性债务治理阶段,共同体应形成"共生"意识、采取"共治"行动、构筑"共担"保障,实现有效共治。     

软件开源发展及商业化分析

随着开源日益快速的发展,开源对软件开发越来越重要。该文对欧美开源发展及商业化情况作了简要分析,列出企业开源的主要途径以及开源商业化的模式。同时针对国内的开源状况,分析了未来我国开源发展的几个重要因素,并提出了相应的建议和措施。     

兵团城镇化建设进程中的金融支持研究

建立金融支持与城镇化综合评价指标体系,运用改进熵权法对城镇化与金融支持水平进行综合评价,并基于综合得分进行城镇化与金融支持协调度分析及金融支持效应分析。结果表明：（1）发现兵团城镇化水平明显提升,金融支持水平提速较缓慢,兵团金融支持结构及人口城镇化呈现负增长。（2）对兵团城镇化与金融支持进行协调性分析,发现二者存在耦合关系,彼此作用、相互促进;兵团城镇化与金融支持匹配度较高的年份其经济发展水平也较高;兵团在重视协调性的同时放慢了发展速度。（3）对兵团金融支持城镇化效应分析,发现兵团金融支持规模及效率对空间城镇化效应显著,对人口及产业城镇化无显著影响,而金融支持结构促进人口城镇化,抑制产业及空间城镇化。     

企业社会资本对社会责任实践影响的实证研究

基于文献梳理,从企业社会责任实践的角度探究企业社会资本的作用。首先对企业社会责任实践与企业社会资本进行维度构建并设计理论模型,其次在数据整理的基础上对企业社会责任实践与企业社会资本影响机理进行实证分析,研究结论表明：网络关系维度显著促进企业外部社会责任实践,但对企业内部社会责任实践无明显影响;信任维度同时对企业内外部社会责任实践产生显著影响。最后,针对实证分析结果给出合理解释并提出相关政策建议。     

Modeling international trade flows and market shares for agricultural commodities: a modified Armington procedure for rice

The Armington procedure (AP) has become increasingly popular in agricultural trade analyses. However, some arguments have arisen concerning the relevance of using the procedure for such analyses. This study examines the assumptions commonly made when using the Armington procedure and suggests modifications for agricultural trade analyses. Results from models utilizing rice-trade data suggest that the assumptions of the single constant elasticity, in particular, may not be appropriate for analyzing agricultural trade. These results also suggest that, with proper modifications, the AP can be applied to agricultural trade. Further, results of a modified Armington procedure indicate that trade in rice exports is highly competitive and that changes in market shares of individual exporters are not independent of changes in budget expenditure allocated to imports.     

Reduction in nitrogen fertilizer use results in increased rice yields and improved environmental protection

Overuse of nitrogen fertilizer represents a considerable environmental problem globally, but especially in China. Recently, a recent approach on an experimental scale based on the diffusion of the so-called Three-Control Technology (TCT) successfully alleviated the overuse of nitrogen fertilizer in southern China villages in the Guangdong Province, serving as a reference point for other rice-producing countries tackling similar challenges. Here, we assessed the correlation between rice yields and reduction in the use of nitrogen fertilizer following the introduction of TCT. Our study was based on the collection of primary data from 248 households randomly selected from four rice-growing areas of Guangdong Province, China. Our results show that TCT significantly improved the efficiency in the use of nitrogen. Crucially, participating farmers, including both full adopters and partial adopters, were found to fundamentally change their application practices of nitrogen fertilizer, resulting in major improvements in the local soil and water systems.     

“城中村”及其改造:一个“三农”的研究视角

迄今为止,大多数研究用"城市的眼光"看待"城中村"及其问题,把"城中村"归结为城市问题.本文将"城中村"定义为制度意义的农村,将"城中村"作为一个特殊的"三农"问题进行研究,提出"城中村"改造的关键是突破"制度瓶颈".     

A fuzzy multi-criteria decision model for international tourist hotels location selection

The main purpose of this paper is to present a fuzzy multi-criteria decision making (FMCDM) model for international tourist hotel location selection. In this article we created 21 criteria for selecting the international tourist hotel location acquired from literatures review and practical investigations. And the methods of fuzzy set theory, linguistic value, hierarchical structure analysis, and fuzzy analytic hierarchy process are used to consolidate decision-makers’ assessments about criteria weightings. Finally, an empirical study for identifying the international tourist hotel location selection in Taiwan is conducted to demonstrate the computational process and effectiveness of FMCDM proposed by this paper.