Does the presence of professional football cause crime in a city? Evidence from Pontiac,Michigan

Using daily panel data from Detroit, we empirically explore the relationship between the National Football League (NFL) and crime in a city. We exploit the natural experiment of the Detroit Lions’ move from Pontiac, Michigan, to downtown Detroit in 2002. Pontiac is used as the treatment city and non-game day crime, other suburban cities, and other cities outside Detroit MSA are used as the comparison groups. Employing a difference-in-difference approach, we find decreases in assaults and vandalism on home game days in Pontiac relative to the control cities after the Lions’ move. We find weak evidence of a net decrease in larceny and vandalism in Pontiac on home game days following the loss of professional football. No changes in assaults and auto theft are reported. While not conclusive, our results suggest that professional football leads to additional larceny and vandalism incidents but no effects on assaults and auto theft.     

Migration decisions under ambiguity: Migration distance effects revisited

There is ample evidence that distance has a strong negative effect on migration. Despite its significance in migration decisions, scholars rarely explore the migration distance effect deeper than the first level of interpretation derived from the simple neoclassical theory of migration. This study revisits the migration distance effect in the spirit of Knightian distinction between risk and uncertainty. To this end, this study attempts to construct estimates of the risk premium migrants are willing to pay to avoid the risk associated with migration distance. The results show that the magnitude of the distance effect is not rationalized by risk aversion in the Arrow–Pratt sense (Arrow, 1965, The theory of risk aversion, Yrjo Jahnssonin Saatio, Helsinki, Finland, 90; Pratt, 1964, Econometrica, 32, 122). In particular, the risk premium demanded by distant rural residents is unjustifiably higher compared with that of those living closer to urban areas in their migration decisions. The results suggest that the migration distance effect is analogous to the equity home bias puzzle and the Ellsberg paradox in that the assumption of subjective expected utility can lead to seemingly irrational human behaviors. Some of the findings in this study shed light on the role of subjective aspects such as perception, confidence, and pessimism in migration decisions, which have been neglected in the literature.     

江泽民对邓小平科技思想的继承与发展

以江泽民为核心的第三代中央领导集体在坚持和继承邓小平科学技术是第一生产力的思想的基础上,与建设有中国特色社会主义的伟大实践相结合,积极探索,勇于创新,极大丰富和发展了邓小平的科学思想.     

WebGIS技术在物流配送系统中的应用

万维网地理信息系统（WebGIS)是Internet技术和地理信息系统技术相结合的产物。在分析WebGIS实现技术的基础上，探讨了基于WebGIS的物流配送系统设计，提出了一个以SuperMap IS平台为基础，基于组件和Java Applet技术，利用ASP来实现界面的显示和交互，体现Brower/Serser三层体系结构的系统解决方案。     

The Effects of Participation and Job-Relevant Information on the Relationship Between Evaluative Style and Job Satisfaction

This study investigates the intervening effects of budgetary participation and job-relevant information on the relationship between budget emphasis and job satisfaction. It proposes that budgetary participation and job-relevant information are endogenous to budget emphasis. Using the path analytical technique and based on a sample of 152 senior managers, the study found that budget emphasis has an insignificant direct effect on job satisfaction, but a strong indirect effect through job-relevant information and budgetary participation. The results also indicate that job-relevant information has an intervening effect on the relationship between participation and job satisfaction.     

Public-Private Partnerships and Prices: Evidence from Water Distribution in France

We use an original database of 5000 French local public authorities to explore the impact of organizational choice and performance as measured by consumer prices. In quantifying the impact of the choice of public-private partnerships (PPPs) on performance, we consider the related issue of the determinants of organizational choice. We estimate a switching regressions model to account for the endogeneity of organizational choice, and find that in our sample, (i) the choice by local public authorities to engage in a PPP is not random, and (ii) conditional on the choice of a PPP, consumer prices are significantly higher on average.     

HEDONIC PRICING MODELS FOR VEHICLE REGISTRATION MARKS

Abstract.  This paper attempts to link Chinese numerology to the determination of vehicle registration mark (VRM) prices in Hong Kong through the hedonic pricing analysis. The values of different patterns of the numbers and Roman alphabet letters are examined. We find that there is a very strong preference for the number '8', that visually appealing patterns add great values to a VRM and that the non-transferable VRMs are more expensive than transferable ones. We also show that their prices move in tandem with the Hang Seng Index. The findings suggest that the government can raise revenue by auctioning off intangible assets containing alphanumerical identification marks.     

离散选择模型的基本原理及其发展演进评介

离散选择模型的研究真正兴起于19世纪50年代末，属于微观计量经济学的范畴。该模型能够对个体和家庭行为进行经验性的统计分析，因而在经济学和其他社会科学中得到广泛的应用。本文从离散选择模型的基本性质及效用最大化的理论背景出发，指出logit模型虽然使用的是最早并且最为广泛的离散选择模型，但是其存在着三大局限性：不能表示随机口味的变化、暗含成比例的替代形式和不能处理不可观测因素在不同期间相关的情形。GEV（含嵌套logit）、probit和混合logit模型等其他的离散选择模型，很大程度上都是为了避免这些限制而产生并发展起来的。     

蜀南竹海环境解译系统的媒介剖析

环境解译系统的媒介是景区硬软件设施与游客发挥互动交流的平台，突出教育与管理本质功能的最重要载体。因此，媒介的合理、科学、有效布置直接关系到环境解译系统功能、作用、目的的发挥。运用实地踏勘与调查问卷相结合的研究方法．对中国主要竹林景区环境解译系统的媒介深入评价与分析，并针对蜀南竹海环境解译系统的现有媒介体系具体剖析，总结出蜀南竹海环境解译系统的媒介特征，为蜀南竹海环境解译系统的成功构建和进一步完善奠定理论基础。     

整合与超越:新全球化时代经济学范式探微

世界正发生着从"旧全球化时代"向"新全球化时代"的重大转变.伴随这一时代转折,建立在传统工业文明基础上的经济学正面临着研究范式的挑战,因为它已经不能适应以高科技为先导,以科技成果的商品化、产业化、国际化为特征的新时代所遇到的各种复杂问题.其研究范式急需进行整合与超越,交往实践观为其提供了新的视域和新的理论范式.