上海A股市场分析师分歧对未来股票回报的预测性研究

本文采用2004年9月至2009年5月间相关数据,通过组合构建策略,分别控制了市值效应、账面值市值比效应和动量效应,发现上海A股市场上分析师分歧对未来股票回报不具有预测性,并分析了造成这一现象的主要原因,进一步在此基础上提出了促进我国证券分析师行业规范化发展的一些政策建议。     

Betting on a buzz: Mispricing and inefficiency in online sportsbooks

Bookmakers sell claims to bettors that depend on the outcomes of professional sports events. Like other financial assets, the wisdom of crowds could help sellers to price these claims more efficiently. We use the Wikipedia profile page views of professional tennis players involved in over 10,000 singles matches to construct a buzz factor. This measures the difference between players in their pre-match page views relative to the usual number of views they received over the previous year. The buzz factor significantly predicts mispricing by bookmakers. Using this fact to forecast match outcomes, we demonstrate that a strategy of betting on players who received more pre-match buzz than their opponents can generate substantial profits. These results imply that sportsbooks could price outcomes more efficiently by listening to the buzz.     

Analysis of topologies and key players in terrorist networks

While topologies and key player positions and roles differ across terrorist networks, similar ideological networks share similar structures and topologies, maintaining structural properties of their predecessor groups. In this study, we look at basic ideological waves of terrorism in history, classify terrorist network ideologies, and describe the patterns in network topologies and key player characteristics. We show that ideological differences in terrorist networks in part explain the differences in the structure of links between key players.     

刍议经济全球化背景下高校思想政治教育

明确经济全球化对高校思想政治教育工作的影响,有利于我们正确把握新时期高校思想政治教育工作的脉搏,及时发现新情况,解决新问题,使得高校思想政治教育工作与时俱进,不断创新。     

Metropolitan patenting, inventor agglomeration and social networks: A tale of two effects

We investigate the separate effects on metropolitan patenting of inventor agglomeration and the structure of social networks linking inventors within and across metropolitan areas in the United States between 1977 and 2002. Using patent data we have been able to assign a metropolitan location to individual inventors, link inventors who have co-authored patents, and characterize the structural features of the networks linking inventors. Our main question concerns the relative importance of salient features of the social networks linking inventors on metropolitan patenting productivity. We find that agglomerative features of metropolitan areas are more important determinants of metropolitan patenting productivity than structural feature of the inventive networks. While the aggregation of isolated inventors correlates positively with patenting productivity, density of connections correlates negatively.