Environmental Taxation and Vertical Cournot Oligopolies: How Eco-industries Matter

This article specifies what an optimal pollution tax should be when dealing with a vertical Cournot oligopoly. Polluting firms sell final goods to consumers and outsource their abatement activities to an environment industry. It is assumed that both markets are imperfectly competitive. Thus, the tax is a single instrument used to regulate three sorts of distortions, one negative externality and two restrictions in production. Consequently, the optimal tax rate is the result of a trade-off that depends on the firms’ market power along the vertical structure. A detailed analysis of Cournot-Nash equilibria in both markets is also performed. In this context, the efficiency of abatement activities plays a key-role. It gives a new understanding to the necessary conditions for the emergence of an eco-industrial sector.      

Competition Policy: What are the Costs and Benefits of Measuring its Costs and Benefits?

Summary  Competition authorities are increasingly measuring the effects of their enforcement actions, seeking a robust justification for the proliferation of competition policy. We highlight the importance of identifying the right counterfactual against which to measure effects, and set out the relevant categories of costs and benefits. We then explore how a balance can be struck between the benefits and inherent limitations of these measurement exercises. Relatively crude analyses of cartel action benefits can be sufficient to achieve public legitimacy for competition policy. Assessing the effects of merger and conduct inquiries is often ambiguous, but could be used to improve decision-making processes. Director and Managing Consultant, respectively, at Oxera, Oxford and London. The valuable comments of Fod Barnes, Kerry Hughes and an anonymous referee are gratefully acknowledged. The opinions expressed in this article are those of the authors alone.     

金融危机下的我国财政风险测度

次贷危机影响了我国的经济和财政态势,经济增长放缓使得财政的收支压力逐步凸显,风险增大。本文采用在国际上得到广泛采纳的风险指标法对我国当前的财政风险状况进行了度量,结论是短期内风险虽有所增加,但仍处在可控范围内;中长期则需要对政策作出适当调整,以降低未来的风险。     

优化化工过程 提高综合效益

化工行业是我国国民经济的支柱产业之一,其发展直接关系到整个国民经济的繁荣,化工工业具有原料,产品,工艺,技术多方案性的基本特征,这种多方案性深刻蕴含着经济的盈亏,社会效益的大小与环境保护的优势,即综合效益。本文有效的利用优化技术解决化工工业中的实际问题,增加综合效益。     

RSS技术的应用和发展趋势探讨

RSS是以XML为基础,用于为内容整合客户端提供选择性的、汇总过的Web内容的技术规范。由于RSS具有简单、规范、通用、容易自动生成等特点,因此越来越多的网站也采用这种方式来发布最新信息。本论文先阐述RSS及其相关技术,接着提出RSS阅读器的一个具体实现,最后对RSS的发展趋势进行深一步的探讨。     

Tourism as an alternative source of regional growth in Portugal: a panel data analysis at NUTS II and III levels

The role of tourism is of vital economic importance, particularly for small countries with a privileged geographical location and favourable weather conditions. This paper examines the importance of tourism as a conditioning factor for higher regional growth in Portugal by employing the conditional convergence hypothesis of Barro and Sala-i-Martin, associated with the endogenous growth theory. The panel data estimation approach provides evidence of the positive impact of tourism (through the accommodation capacity) on the growth in per-capita income among the Portuguese regions, increasing the rate of convergence. Therefore, tourism can be considered as an alternative source for stimulating higher regional growth in Portugal, if the supply characteristics of this sector are improved.     

西部收入偏低亟待改革

改革开放以来，由于各种原因使得我国地区之间的经济发展水平和收入水平有了很大的差距。对于这些差距，我们可以通过对人均经济收入、人均财政收入、城镇居民可支配收入、农民人均纯收入、人均国际收入等五个指标的分析中详细地看到。从客观性和可行性的意义上讲，西部地区要在短时期内消除这些差距，是根本不可能的。因此，作为西部地区来讲，应该选择实事求是的态度，既要正视这些差距的长期存在，又要通过体制创新、政策创新、战略创新等，努力探索试图缩小差距的途径和对策。     

Risk Arbitrage in Takeovers

This article studies the role of risk arbitrageurs in takeoversand the source of their advantage. We show how the presenceof arbitrageurs affects the value of the target shares, sincearbitrageurs are more likely to tender. Therefore an arbitrageurhas the informational advantage of knowing he bought shares.In equilibrium, the number of arbitrageurs buying shares andthe price they pay are determined endogenously. We also presentseveral empirical implications, including the relationship amongtrading volume, takeover premium, liquidity of the shares, andthe number of risk arbitrageurs investing in one particulardeal.     

基于Panel—Data模型的山东省区域旅游问题研究

旅游业已被公认为“朝阳产业”、“无烟工业”，是集吃、住、行、游、购、娱为一体的综合性很强的产业，其光明的发展前景已为世人所公认。旅游业对其相关产业的牵动比例为1：4，可以充分带动地方经济的发展，发展潜力很大。本文运用了山东省17地市的国内旅游情况的合成数据，通过建立完整的计量模型，进行计量分析，进而发现各地市每增加一万人次的旅游者，对该地区的旅游经济的影响存在一定的差异，并且对于差异进行聚类分析，得出全省各地市的不同属类，为山东省日后旅游市场的更好发展提出了一些相应的建议。