Neighborhood effects and trial on the internet: Evidence from online grocery retailing

For traditional retailers the customer pool is largely bounded in space, whereas an Internet retailer can obtain customers from a wide geographical area. We examine customer trials at Netgrocer.com, and drawing on studies in marketing and economics conjecture that exposure spatially to proximate others (through direct social interaction or observation), can influence decisions of those who have yet to try. Trials arise from utility-maximizing behavior and the model is estimated as a discrete time hazard. The data span: (1) 29,701 residential zip codes, (2) 45 months of transactions since inception, and (3) zip code contiguity relationships. The estimated neighborhood effect is significantly positive and economically meaningful.

国内外乙二醇的供需现状及发展前景

分析了国内外乙二醇的生产消费现状及发展前景,提出了我国乙二醇行业今后的发展建议.     

GE 90-30冗余PLC在水电厂监控系统中的应用

文章详细介绍了GE Fanuc系列90-30 PLC和VersaMax的I/O模块构成的双Genius网络控制系统在水电站计算机监控系统中的应用。     

Attributes affecting the level of tourist satisfaction with and loyalty towards theatrical performance in China: Evidence from a qualitative study

This study seeks to explore attributes affecting the level of tourist satisfaction with and loyalty towards theatrical performance in China. Based on four focus group discussions with 31 participants, the study identifies 34 attributes that affect the level of tourist satisfaction with theatrical performance, and groups them into five categories: stage, performance, venue, service and tourist‐related attributes. The findings on tourist loyalty reveal that 21 of the 31 respondents would not watch the same theatrical performance alone in the future; however, they would recommend it to others. The study concludes with a discussion of the rich and insightful findings and their implications for tourism industry practitioners. Copyright © 2010 John Wiley & Sons, Ltd.     

改革开放30年来江苏和广东经济发展路径对比研究

中国省域经济格局中,广东和江苏占据两席重要地位。通过对两省社会发展背景的全面比较,系统回顾了粤、苏两地经济和社会发展历程与轨迹,抽炼出各自经济发展的主导模式。最后,针对两省存在的优劣势,提出两省未来经济发展的建议和对策,尤其提出两省未来经济合作的可能性。     

环渤海地区汽车产业产学研集成化合作模式探讨

汽车产业是环渤海地区的支柱产业,自主创新是汽车产业发展的关键。实现自主创新的有效途径是集成各方面的资源优势,构建集成化产学研合作模式。环渤海区域已具备产学研集成化合作的条件,实现的途径是建立健全整体运行机制和保障机制。     

Business Cycle Asymmetry in China： Evidence from Friedman＇s Plucking Model

Friedman＇s plucking model of business fluctuations suggests that output cannot exceed an upper limit, but it is occasionally ＂plucked＂ downward below trends as a result of economic recessions. This paper investigates China＇s business fluetuations using quarterly real GDP data for the period 1978 2009. Our results show some evidence supporting Friedman＇s plucking model. We find that a ceiling effect of real output exists, and that negative asymmetric shocks significantly affect the transitory component, which captures the plucking downward behavior during the recession. The results also suggest that the basic asymmetric unobserved component model is not appropriate for directly modeling China＇s real output because the business＂ cycle is inaccurately measured, but it works quite well when considering a structural break in the second quarter of 1992. The results reveal that although China＇s economy strengthened in the second quarter of 2009, it is essential for China＇s government to take further positive and effective measures to maintain sustainable development of the economy.     

国际金融危机与美国的单极地位——当前美国的国家实力、国内制度和国际战略调整

国内政治经济制度和国家从国际秩序中获益性将决定一定时期内该大国的兴衰趋势。在分析国际金融危机与美国的单极地位时,作者在考察国际金融危机对主要大国和地区所造成的冲击时发现,美国所受到的冲击相对较轻,而它的综合国力、失业率和国际竞争力指标都仍然领先,即便从短期效应来说,国际金融危机致使美国实力衰落的观点值得质疑。从应对金融危机的经验和美国社会的人口结构等因素来看,美国的优势仍然存在。在短期内,整个美国社会并没有因为金融危机而出现大的动荡。从长期来说,国际金融危机可能会促进美国国内政治和经济制度的改良,也有利于奥巴马政府调整国际战略,避免承担过多的国际责任和过度扩张,进而重振美国在国际秩序中的领导地位。在这些调整过程中,如果奥巴马政府采取了一种稳健的方式,坚持自由市场的基本原则和分权制衡的政治传统,经历了国际金融危机的美国霸权及其单极地位相反有可能会进一步得到加强。     

商业银行对科技中小企业贷款方式的研究

商业银行贷款给科技中小企业面临着高风险,而高收益的要求在我国由于分业经营和利率浮动上限的限制,不能得到满足。文章设计的资产价格浮动利率法和滚动结算法可以使银行贷款给科技中小企业,承担高风险的同时,获得高收益,从而增强商业银行给科技中小企业贷款的激励,解决科技中小企业的融资难题。     

经济结构调整在污染治理中的作用——基于中国1985—2009年的实证分析

经济结构及其调整是否有利于治污减排目标的实现,这是政策制定者非常关心的问题。本文通过中国1985—2009年的统计数据,分析经济结构及其调整与三类主要污染物排放之间的关系。研究发现,随着经济结构的改善和优化,污染物排放呈现逐渐下降的趋势,也就是说经济结构调整有助于污染治理。本文的研究为资源环境约束下经济结构调整的必要性进一步给出了经验证据。