社会收入对西部城乡收入差距的影响——基于11省市2000户居民的调查数据

对城乡收入差距的研究最终将关注于真实收入的差异,本文依据对西部地区11个省市的2000个镇(村)2000户居民的调查数据的统计分析,发现西部地区社会收入的差距比经济收入的差距大得多;社会收入会对城乡收入差距产生直接影响,使西部地区城乡收入比扩大10.4%。因此,建议重视缩小西部地区城乡社会收入差距的政策设计、增加西部地区农村居民的社会收入、推行城乡一体化的社会保障体系、改革收入统计。     

行政区划调整对住宅价格变化的影响效应分析——以南汇并入浦东新区为例

行政区划的调整往往是为了适应城市化和区域经济一体化的要求而进行的。除经济和生态环境因素外,住宅价格还受社会、文化和政治等因素的影响和作用,但行政因素对住宅价格变化影响的实证研究并不多见。以上海市南汇区并入浦东新区为例,运用Hedonic模型、多元线性回归分析、半弹性系数等方法,从时间和空间两个方面,定量测度行政区划调整对住宅市场价格变化的影响程度。结果表明:从时间变化上看,行政区划调整以后,浦东新区各板块的住宅均价呈现上涨趋势,住宅价格比调整之前上涨2.74个百分点,且前阶段的涨幅较之后要大;从空间变化上看,外郊环、郊环外涨幅潜力更大。总体而言,行政区划调整对区域住宅价格变化有一定的正面影响,但其影响程度有限且不及区位、交通和住宅特征等因素显著。因此,地方政府和房地产开发商应当理性对待行政区划调整策略,不能过于奢望通过短期的行政区划调整来提升房地产价值,而应当更多地关注开发区位的选址及区域交通和环境条件的改善,提升物业管理水平与服务质量,完善社区公共服务配套设施建设。     

Monetary and fiscal policy interactions in the post-war U.S.

A New Keynesian model allowing for an active monetary and passive fiscal policy (AMPF) regime and a passive monetary and active fiscal policy (PMAF) regime is estimated to fit various U.S. samples from 1955 to 2007. The results show that data in the pre-Volcker periods strongly prefer an AMPF regime, even with a prior centered in the PMAF region. The estimation, however, is not very informative about whether the Federal Reserve's reaction to inflation is greater than one in the pre-Volcker period, because much lower values can still preserve determinacy under passive fiscal policy. In addition, whether a PMAF regime can generate consumption growth following a government spending increase depends on the degree of price stickiness. An income tax cut can yield an unusual negative labor response if monetary policy aggressively stabilizes output growth.     

Where have all the flowers gone? Forecasting green trends in the automobile industry with a choice-based conjoint adoption model

With rising gas prices, global warming, and green thinking, all-electric vehicles are currently considered the automobile technology of the future. However, besides their advantages electric drive trains also exhibit several disadvantages. Moreover, history shows several failed attempts to establish electric vehicles. Thus, a reliable forecasting model is needed that predicts if the current trend is sustainable. We develop and empirically test a choice-based conjoint adoption model that uses individual-level preferences as a basis for prediction. Predictions are mapped to the time of the next planned purchase in order to establish the adoption process. The model extends existing research in several ways. First, no prior information, e.g., historical market data or a functional form of the adoption process, has to be integrated. Second, the model allows dynamic modifications of product specifications or competition at different points in time. Third, a no-choice option can be integrated so that a technology switch is not forced by the model itself and switching costs can be considered. The empirical results reveal different critical factors for the adoption of all-electric vehicles, such as purchase price, range, timing of the market entry, or environmental evolution, which could lead to a solid base of consumers preferring this option.     

The interaction effect of strategic orientations on new product performance in the high-tech industry: A nonlinear model

Innovation and market orientation are two strategic orientations or business philosophies that can guide a company in its business activities. Although the interaction effect of these two strategic orientations is conceptually recognized as a critical factor for new product's success, empirical results are mixed. This paper examines this issue in terms of innovation orientation, two types of market orientations (responsive and proactive), and new product performance. Based on a sample of 107 high-tech firms, the results of this study show that the interaction between innovation orientation and two types of market orientation yields different patterns of nonlinear responses for new product performance. Specifically, new product performance, when derived from the interaction between innovation orientation and responsive market orientation, is in the form of an inverted U, i.e., the interaction effect is contributory to firm performance until an optimal level is reached, and then the effect becomes detrimental thereafter. However, new product performance derived from innovation orientation and proactive market orientation is in the form of a U, i.e., the interaction effect is detrimental to firm performance until a threshold level is reached and then the effect becomes contributory thereafter. The different patterns of new product performance indicate that the costs and organizational learning effects of these two strategic orientation interactions are dissimilar. The paper concludes with a discussion of theoretical and practical implications of these findings.     

货币冲击与中国经济波动——基于DSGE模型的数量分析

基于1993~2008年的季度数据,本文在一个包含Calvo价格粘性的新凯恩斯主义模型中,讨论了中国货币冲击与经济增长的关系。在假定货币政策通过调整货币供给增长实施的前提下,本文根据模型模拟和实际数据的对比以及脉冲响应函数分析得出以下结论:(1)货币并非我国经济波动根源,实际产出对货币供给具有一定反馈作用。(2)通货膨胀的顺周期性和领先增长表明中国经济周期存在总需求拉动的特性。物价波动在中短期主要由货币供应量波动引起。(3)货币政策对实体经济有效但效果有限,货币供给变动对投资的作用效力更大,对消费需求刺激有限。     

产业转移的新经济地理学解释

不同于传统的产业转移理论,新经济地理学在规模报酬和垄断竞争框架下解释了产业转移现象,认为产业转移的基础不必然是第一自然的差异,在完全相同的均质空间下,由于市场接近效应、生活成本效应和市场拥挤效应所构成的集聚力和扩散力的相互作用,产业转移也会发生,并且表现出突发性、自我强化、预期自我实现和价值链环节分离的特性及关联度弱的产业先转移等规律。此外,新经济地理学还运用一般均衡分析方法考察了产业转移的福利效应,包括瓦尔拉斯效应、生产租金和规模区位效应、累积效应以及转移效应,并对影响产业转移的税收优惠竞争、公共基础设施改善和区域补贴等政策措施的效果进行了剖析。     

Signaling quality with new product preannouncements: Vaporware and the role of reference quality

This research develops a signaling game that captures the essential dynamics of new product preannouncements (preannouncement/launch/market feedback). New product preannouncements are preannouncing firms' formal efforts to inform their competitors and customers about the future availability, superior quality and introductory price of their upcoming new products. In a market, two firms compete (entrant preannounces and incumbent responds) across two periods. The entrant has private information about the true quality of a new product (the incumbent and customers do not know it), and this informational asymmetry provides the entrant with a preannouncement dilemma. Should the entrant preannounce and, if the entrant does, should the entrant tell the truth about quality? Preannouncements often get customers who might buy now from a competitor to wait for a higher quality to be available. Therefore, the entrant may have an incentive to bluff the quality of a new product in order to enhance the likelihood of customers' waiting. However, because the quality exaggeration is also likely to increase customers' quality expectations, the entrant may suffer a significant sales penalty if the entrant does not deliver the promised quality. Through the signaling game, this paper derives conditions under which such a bluff does/does not put the preannouncing firm at risk (i.e., this paper derives the separating/pooling equilibria that are the focus of signaling games).     

Why the Generalized Bass Model leads to odd optimal advertising policies

We show that the optimal advertising strategy under the Generalized Bass Model (GBM) involves beginning at an extremely low level (the lower the better) and then increasing spending throughout the planning period. This strategy remains optimal in the presence of decreasing prices that affect both margins and diffusion speed. We provide a simple explanation for why this happens. We further show that the intuitively appealing patterns of continuous decrease or increase-then-decrease (both with an uptick towards the end) identified in earlier research are also possible as optimal dynamic advertising paths under the GBM structure, but only if the advertising at launch is constrained to be higher than a particular threshold, which we identify. The constraint necessary to generate intuitively appealing strategies lowers overall profits. Therefore, the GBM generates advertising policy recommendations that most marketers would deem odd. This casts doubt on the value of the GBM for normative purposes. Other existing diffusion models are preferred when seeking normative guidance on optimal dynamic advertising policies for new products subject to word of mouth.     

天津发展国际医疗旅游的战略思考

跨国接受医学诊治和疗养康复是国际医疗旅游的主要目的。运用SWOT分析法,研究天津现阶段发展国际医疗旅游的条件和可行性,提出＂医疗资源配置与旅游基础建设相结合—开发医疗旅游国际市场＂双战略目标,同时指出天津在医疗旅游规划、政策创新和机制创新等方面可以采取的一系列战略措施。