The other January effect: International, style, and subperiod evidence

We report international, style, and subperiod evidence for the other January effect (OJE) documented in Cooper et al. [2006. The other January effect. Journal of Financial Economics 82, 315–341]. When examining the OJE in 22 countries starting as early as 1801, we find that the spread between 11-month returns following positive and negative Januarys does tend to be positive. However, the spreads are rarely statistically significant and the returns of other calendar months exhibit similar subsequent 11-month return spreads. Further, the international OJE spreads and the OJE spreads in disaggregate U.S.-style portfolios are more related to the U.S. market-level January return, rather than the respective country-specific or portfolio-specific January return. Finally, the OJE is weaker over the 1975–2006 post-discovery period than over the 1940–1974 pre-discovery period. Our evidence indicates that the OJE is primarily a U.S. market-level-based phenomenon that has diminished over time, which suggests a ‘temporary anomaly’ interpretation.     

另类交易系统的法律界定

作为一种新型证券交易场所，另类交易系统是一种以互联网为基础的，依据一定规则自动聚集并撮合投资者委托买卖证券指令的电子交易系统。它属于场外交易场所的范畴，与传统交易所相比，其交易对象更广，交易流程更为便捷，交易规则特殊，同投资者之间的法律关系也不同。它的出现，不仅对传统交易所和中介机构的地位产生了强烈冲击，而且对传统的证券监管体制和证券诉讼也产生了深刻影响。本文在国外对另类交易系统概念界定的基础上，论述了其基本概念和特征，以期为将来我国另类交易系统的立法和监管提供理论参考。     

Comment on ‘earnings management around UK open offers’

This note discusses the result of Iqbal, A., S. Espenlaub, and N. Strong. 2008 Iqbal, A., Espenlaub, S. and Strong, N. 2008. Earnings management around UK open offers. European Journal of Finance, this issue [Google Scholar]. Earnings management around UK open offers. European Journal of Finance, this issue, regarding long-run abnormal returns following open offers and announcement abnormal returns, compared with differing results in two previous studies based on similar samples. A survivorship bias explains some of the differences in the reported long-run abnormal returns. The difference in the announcement abnormal returns could be due to use of different data sources.     

Short-sellers: Informed but restricted

According to theory, the level of short-selling can predict short-run future returns through two channels. One channel relates to the demand-side of the stock lending market: short-sellers are informed. The other channel relates to the supply-side: short-sellers are restricted. Measuring the importance of each channel is empirically challenging when, in general, supply and demand in the stock lending market are not directly observable. This paper takes advantage of a unique dataset that contains actual shifts in lending supply of stocks on the Brazilian market and proposes an identification strategy for the effects of both supply and demand on stock prices. We find that both channels are important.     

货币供应量对我国股票市场影响的实证研究

本文将货币供应量与沪深股指作为代表变量纳入货币金融系统内进行分析,旨在借鉴较为成熟的金融计量方法实证分析货币供应量对于股票价格指数的互动情况,建立适当的VAR模型以及利用VAR模型进行分析,同时对数据进行乔纳森检验(Johansen检验)和格兰杰(Granger)因果检验,并在此基础上分析货币供应量作为货币政策中介工具作用于股票市场的可控性和可测性,从而研究货币供应量与股票价格指数之间的相关关系,得出货币供应量对于股票市场的一般影响机制,指出我国货币政策的缺陷和存在的问题,提出相应的应对策略与建议。     

Distinguishing external from internal scale effects: The case of public infrastructure

The recent applied production theory literature focusing on the economic performance of firms has increasingly recognized the importance of scale effects on costs and therefore efficiency. These scale effects may include short run returns due to fixity of privately demanded inputs (i.e., capital, long run internal returns to scale, and external factors affecting costs. Since these different types of scale effects can be thought of as shifts in and movements along cost curves, the different cost effects of such factors can be identified in a framework which explicitly takes them into account in the definition ofscale.In this article we formalize such a framework, and then use it to measure short run, long run (internal) and external scale effects from fixity of private capital, nonconstant returns to scale and public infrastructure. We then use these measures to identify the impacts of these different scale factors on productivity growth. The focus on public infrastructure as an important external scale factor is motivated by the current theoretical and policy interest in this issue; we show how a structural production theory model provides a rich basis for the analysis of the cost effects of infrastructure investment.     

异质性媒体与资本市场信息效率

新闻传媒通过其信息处理和传播功能 ,对资本市场的信息整合产生了重要影响.不同于以往的研究 ,文章深入新闻传媒行业内部 ,探讨了不同类别的媒体(中央媒体与各地方媒体)对中国资本市场信息效率的差异化影响.研究发现:中央媒体既可以直接提升资本市场信息效率 ,又可以通过削弱政治关联对资本市场信息整合的不利影响,间接改善资本市场信息效率;地方媒体虽然能够直接提升资本市场信息效率 ,但是无力削弱政治关联对资本市场信息整合的不利影响 ,其间接渠道并不起作用.这一结果考虑了媒体跟踪上市公司时可能产生的内生性问题 ,在一系列稳健性测试中始终存在.文章认为 ,相对于地方媒体 ,中央媒体在信息透明度较低情况下的信息获取和处理的能力优势 ,以及面对政治关联时保持客观报道的独立性优势,可以解释这一发现.