Corporate disclosure and price discovery associated with NYSE temporary trading halts*

Abstract. This paper examines the properties of corporate disclosure and price discovery associated with NYSE temporary trading halts. We address the hypothesis that managers release highly informative disclosures outside of trading hours or seek a trading halt to allow investors greater opportunity to assess the implications of new information. We investigate whether: (a) disclosures associated with trading halts are highly price informative, and (b) the process of price discovery as reflected in specialist indications is more protracted and difficult for extreme and bad news halts. We find that halts arise from non-routine highly informative disclosures for which price discovery is more uncertain and protracted. First, most disclosures associated with our sample of trading halts are ones whose arrival investors cannot predict but which have large valuation effects (e.g., corporate takeovers and leveraged buyouts). Second, halts associated with large price changes exhibit more uncertain and protracted price discovery during the halt. Specialist indications for extreme news halts have (1) bigger differences between high and low prices, (2) poorer predictive accuracy with respect to opening price, and (3) greater frequency. Finally, similar comparisons for bad and good news only weakly support the conjecture that bad news is associated with more certain and protracted price discovery. Résumé. Les auteurs examinent les propriétés des renseignements fournis par les sociétés et de la supputation des cours en période d'arrêt temporaire des opérations de la Bourse de New York. Ils se penchent sur l'hypothèse selon laquelle les gestionnaires publient des renseignements très informatifs en dehors des heures d'activite ou en période d'arrêt des opérations, de façon à donner aux investisseurs tout le loisir d'évaluer les conséquences de ces renseignements. Les auteurs se demandent 1) si l'information publiée en période d'arrêt des opérations est très éclairante sur les cours et b) si le processus de supputation du cours tel que l'illustrent les indications des spécialistes est plus long et plus difficile lorsque les arrêts sont associés à des renseignements qui entraînent des variations du cours d'une grande amplitude ou des variations du cours négatives. Selon les auteurs, il y a arrêt des opérations lorsque les renseignements publiés sortent de l'ordinaire et que leur contenu en information est élevé, si bien que le processus de supputation du cours est plus incertain et plus long. Premièrement, la plupart des déclarations associées à notre échantillon d'arrêts des opérations sont de nature telle qu'il était impossible pour les investisseurs d'en prédire l'occurrence, mais ont des conséquences majeures sur l'évaluation de l'entreprise (par exemple, les prises de contrôle et les prises de contrôle adossées). Deuxièmement, les arrêts des opérations correspondant à d'importantes variations du cours sont caractérisés par un processus de supputation du prix plus incertain et plus long. Les indications des spécialistes en ce qui a trait aux arrêts des opérations associés à des renseignements qui entraînent des variations du cours d'une grande amplitude présentent 1) un écart plus grand entre cours élevé et cours faible, 2) moins de précision dans les prédictions relatives au cours d'ouverture et 3) une fréquence supérieure. Enfin, des comparaisons analogues en ce qui a trait aux renseignements positifs et aux renseignements négatifs corroborent seulement faiblement l'hypothèse selon laquelle les renseignements négatifs rendent la processus de supputation du cours plus certain et plus long.     

PAYING FOR LOYALTY: PRODUCT BUNDLING IN OLIGOPOLY*

In recent times, pairs of retailers such as supermarket and retail gasoline chains have offered bundled discounts to customers who buy their respective product brands. These discounts are a fixed amount off the headline prices that allied brands continue to set independently. We show that a pair of firms can profit from offering a bundled discount to the detriment of other firms and consumers whose preferences are farther removed from the bundled brands. Indeed, when both pairs of firms negotiate bundling arrangements, there are no beneficiaries and consumers simply find themselves consuming a sub‐optimal brand mix.     

试论环境保护工作中的“追本清源”

本文在学习邓小平经济理论的基础上 ,对邓小平经济理论继承和发展马克思主义经济学的观点进行了研究和阐述。     

An Experimental Investigation of Approaches to Audit Decision Making: An Evaluation Using Systems‐Mediated Mental Models*

The objective of this research is to articulate a decision‐making foundation for the systems audit approach. Under this audit approach, the auditor first gains an understanding of the auditee's economic environment, strategy, and business processes and then forms expectations about its performance and financial reporting. Proponents of this audit approach argue that decision making is enhanced because the knowledge of the system allows the auditor to focus on the most important risks. However, there has not been an explicit framework to explain how systems knowledge can enhance decision making. To provide such a framework, we combine mental model theory with general systems theory to produce a hypothesis we refer to as a systems‐mediated mental model hypothesis. We test this hypothesis using experimental economics methods. We find that (1) subjects make systematic errors under the setting without an organizing framework provided by the systems information, and (2) the presence of an organizing framework results in lower reporting errors. Importantly, the organizing framework significantly enhances decision making in the settings where the environment changed. Establishing a decision‐making foundation for systems audits can provide an important building block that, in part, can contribute to the development of a more effective and efficient audit technology ‐ an important objective now when audits are facing a credibility crisis.     

企业集团特征与成员企业价值

作为外部市场机制的一种替代形式,企业集团在发展中国家广泛存在。一方面,企业集团通过建立内部市场降低成员企业(Group-affiliated Com- panies)之间的交易成本,能够提高企业的价值;另一方面,企业集团内部控股股东与其他股东之间的代理问题相对于独立经营的公司更加严重,对其成员企业价值存在负面影响。本文以我国A股上市公司中的集团成员企业为样本,采用实证的方法研究了集团化经营方式对其成员企业价值的影响。结果表明:集团成员企业的经营效率和市场价值总体上均显著优于其所在行业的中值;同时,集团内上市公司数量的增多、集团层面的多元化经营都会显著提高成员企业的市场价值;但是,政府作为集团最终控股人或者控股股东持股比例过高时,集团产生的代理问题对成员公司价值存在显著的负面影响。     

An English Assessment of Scotland's Education Spending Needs

Scotland has much higher public expenditure per head than England, but little work has been done to compare Scottish and English needs. We compare their needs for school education, and we show that if the Formula Spending Share approach that is used to estimate English local authorities' needs were applied in Scotland, then Scotland would be found to need about 3 per cent more per pupil than England; however, this English approach may slightly underestimate Scotland's needs. We also show that the Grant Aided Expenditure approach that is actually used to estimate Scottish local authorities' needs may be about 7 per cent more generous than the English approach. Finally, we find that the correlation between the relative education needs for different authorities as assessed by the Scottish approach and their relative needs as assessed by the English approach is only modest; this implies that there may be serious shortcomings in at least one approach.