城市商品住宅价格水平影响因素研究

商品住宅价格问题是社会关注的焦点问题.以全国35个重点城市1999年-2005年数据为基础,研究城市住宅价格水平的影响因素.研究显示,代表城市经济发展水平和居民收入水平、单位面积土地投入、城市区位和城市环境等侧面的职工平均工资、单位面积固定资产投资、人均铺装道路面积、距海岸线的距离、通过城市的国道数量、建成区绿化覆盖率这6个因素是影响城市住宅价格水平的主要因素.可以预期,当一个城市的这些因素发生相对变化和绝对变化的时候,城市的住宅价格水平必然会发生相应的变化.阳光充足、水资源丰富、交通便捷的近海地区城市的商品住宅价格变动幅度会由于经济发展、人口增加、区住条件进一步优化、投入加大等各种条件的较大变化而高于其他城市.     

正式制度、非正式制度质量与比较优势

本文借鉴Levchenko(2007)的做法构建了一个包含制度质量的一般均衡框架,基于制度的两种不同的分化形态--正式与非正式制度,阐述了制度性比较优势的形成机制以及两种制度在其中所扮演的角色。在这个仅包含两个互相贸易地区的模型中,如果正式和非正式制度的质量简单地正相关,则制度质量较高的地区将获得制度依赖型产品的出口优势。然而,比较优势的归属会以正式与非正式制度的交互方式为转移,当且仅当制度占优的地区正式制度质量足够好,或制度占劣的地区正式制度质量足够差时,此前的结论才能继续成立。在经验分析中,基于Nunn(2007)回归模型的拓展形式,本文利用中国30个省级行政区28个制造业细分行业的相关数据,分析了制度质量与产品出口比较优势的关系。研究发现正式制度质量的提升将显著促进契约密集型产品的出口。尽管非正式制度的这一效应并不明显,但二者的联合作用仍得到了强有力的统计支持。     

我国进出口商品结构与对外直接投资的相关性研究──基于VAR模型的分析框架

本文以我国1982-2007年的相关数据为样本,基于VAR模型的分析框架实证研究了我国进出口商品结构与对外直接投资的相关性。结果表明:进出口商品结构与对外直接投资存在长期均衡关系,其中初级产品出口、工业制成品出口分别与对外直接投资存在相互替代效应,初级产品进口、工业制成品出口分别与对外直接投资存在相互补充效应;进出口商品结构中各变量与对外直接投资均不存在短期因果关系,但共同构成了影响对外直接投资变化的短期因素。     

中间产品贸易、技术溢出与发展中国家的工资差距:一个理论框架

中间产品贸易的技术溢出是国际贸易影响熟练劳动力与非熟练劳动力之间工资差距的一个重要机制。本文构建了一个理论框架,从中间产品贸易及其技术溢出效应的角度解释发展中国家相对工资差距不断扩大的现实。发展中国家从技术前沿的发达国家进口资本和技术密集型的中间产品,一方面可以使发展中国家间接地分享国际先进的R&D资本;另一方面给发展中国家带来了技术学习和模仿的机会。由于资本与技能的互补性和技术学习的技能偏向性,中间产品进口使发展中国家增加了对熟练劳动力的相对需求,从而扩大了熟练劳动力与非熟练劳动力之间的工资差距。     

住房耐用品、土地市场分割与货币失踪之谜

2008年国际金融危机后,我国M2供给增幅远高于CPI上涨幅度,这一现象被学界称为“货币失踪之谜”。本文构建了一个两部门新凯恩斯货币模型来研究这一问题。当外部需求下降后,央行降低利率以提振经济,房地产部门和非房地产部门同时扩张。由于住房属于耐用消费品,具有一定的金融属性,其需求对利率变化更敏感。利率下降后,住房需求相对普通消费品需求上升更多。因为存在土地市场分割,商住用地供给弹性较小,住房需求上升导致商住用地价格上升较多,地价上涨提升了房地产企业的抵押融资能力,房地产部门进一步扩张。普通消费品需求对利率反应小,需求较弱导致工业用地价格上升幅度较小,非房地产部门抵押融资能力小幅提升。因此,非房地产部门产出和CPI只温和扩张。Ramsey最优货币政策模拟表明,只有实现了房地产部门与非房地产部门均衡发展,才能实现社会福利最大化。     

Characterizations of the Pareto and related distributions

In this note, a class of Pareto distributions is characterized based on the Shannon entropy of k-record statistics. As a consequence of that characterizations of the uniform and exponential distributions are given. Received: October 1999     

论税收政策对企业债权债务的影响

针对我国大中型企业普遍存在的三角债问题,根据现行税法中《增值税暂行条例》的规定,提出了对销售债权债务发生时的计税及会计处理方法的建议。     

Application of an ecosystem function framework to perceptions of community woodlands

Owners, local residents, government, and conservation organisations can express divergent preferences in the development and management of local woodlands. The perceptions of these four groups were examined, in the context of three community woodlands in Eastern England, using an ecosystem function framework. In a pilot study, residents were able to allocate a relative importance to woodland ecosystem services which were then related to “regulation”, “habitat”, and “production” or “information” functions. However residents also placed importance on negative services or “dis-services” associated with the woodland ecosystem. Therefore a fifth category of “dis-services” was included in the main survey which included 84 local residents, three woodland owners, three government institutions, and six representatives from conservation groups. Each of the four groups placed greatest importance on services associated with habitat (16–39% of the total importance) and information (30–50%) functions suggesting, in this example, mutual interest in the use of woodlands as a habitat or recreational resource. By contrast a potential area of difference was the particularly high importance placed by one owner on dis-services such as fly tipping. In addition the woodland owners placed higher importance (10–20%), than local residents and conservation groups (7–9%), on the productive services of the wood. This suggests a need for communication when production-related operations affect recreation. The ecosystem function framework appears to be a useful approach for highlighting potential tensions and areas of mutual interest in the management of semi-natural ecosystems.     

The welfare effects of FDI: A quantitative analysis

Foreign direct investment (FDI) can increase productivity and wages. However, it is also often accompanied by primary income deficits as foreign-owned firms repatriate their profits. The welfare effects of FDI are thus ambiguous. A particularly illustrative example of this phenomenon are the Visegrád 4 (V4) countries (Czech Republic, Hungary, Poland, Slovakia). This paper investigates whether FDI can be beneficial in the presence of profit repatriation using a general equilibrium model calibrated to the V4 economies. Counterfactual simulations suggest that the benefits of FDI outweigh the costs for these countries. On average, a 1% increase in the share of foreign firms is associated with a 0.17% increase in welfare. However, incentivising foreign firms to reinvest more of their profits domestically is, ceteris paribus, welfare-improving. A 10-percentage-point increase in the profit repatriation rate is associated with a 1.06% welfare gain on average.     

Energy import costs in a flexible input-output price model

A fundamental assumption of the input-output (IO) model is a fixed relationship between interindustry flows. In the price version of the model, the assumption of fixed-coefficients prevents the optimal mix of inputs being adjusted when relative prices change. The aim of this paper is to evaluate the role of energy import prices in the IO price model without the usual non-substitution technology inherent to the input-output structure. The analysis includes alternative substitution possibilities for the elements that comprise the sectoral costs, which are empirically implemented from an IO dataset. The various substitution scenarios are defined by three different cost structures: the Leontief, Cobb-Douglas and Constant Elasticity of Substitution (CES) functions. The empirical application to the Catalan economy illustrates the relevance of the flexibility option used for explaining the quantitative influence of energy import prices on domestic prices. Adapting the traditional input-output model to include factor substitution makes it possible to overcome the rigidity in transmitting price impacts, and illustrates a range of possible effects.