Helping behavior in a virtual crisis situation: effects of safety awareness and crisis communication

Incident evaluations show that bystanders tend to help: they do not wait for professionals to arrive, but act as required by the situation at hand. In the present study, we investigated how safety awareness (induced before an accident happened) and providing a course of action by emergency services affect helping behavior after witnessing a virtual accident with two victims. The main task of the participants was to arrive at a job interview in time. Safety awareness was manipulated by the specific organization they went to: either promoting safe traffic or healthy living. The results show that all participants were inclined to help. Participants who were primed towards safe traffic more often called the emergency number, but talked to the victim less often. Participants who had received specific courses of action moved the victim less often. In all, the results clearly indicate the value of effective risk communication (before an event occurs) and crisis communication (after an event has occurred), as both types of information improve the quality of actual helping behavior at the scene.     

The power of imperfect imitation

We examine the power and limitations of imitation. Naive intuition may hold that the efficacy of imitation would be diminished by imperfections in copying high‐performing firms. Employing a computational model, we study the dynamics of imitation when firms are subject to bounded rationality that limits their ability to copy the market leader. We find that imperfect imitation can generate unexpectedly good outcomes for follower firms—indeed, better than the outcomes achieved if they were perfect imitators. Moreover, imperfect imitation, from time to time, enables follower firms to surpass superior firms. These findings suggest there is an adaptive role to mechanisms, such as bounded rationality, that make perfect imitation difficult. Copyright © 2012 John Wiley & Sons, Ltd.     

Strength in numbers or guilt by association? Intragroup effects of female chief executive announcements

We predict that the media reports on female CEOs as a coherent group, whereas male CEOs are treated as individuals by the media. We also suggest that the resulting investors' perceptions of group entitativity of female‐led firms may not only influence the succession event–performance relationship at the focal firm, but may also have a significant effect on the value of other female‐led companies. Results of a text analysis and an event study of appointments of female CEOs to Fortune 1000 firms provide support for these predictions. Copyright © 2013 John Wiley & Sons, Ltd.     

The dynamics of emerging economy MNEs: How the internationalization process model can guide future research

The rapid emergence of multinational enterprises (MNEs) from emerging economies calls for a re-assessment of established theories of the MNE. We assess the usefulness of the internationalization process model (IPM), also known as the Uppsala model, to explain the recent strategies of emerging economy MNEs. We argue that popular stages models derived from the IPM are not helpful, but the underlying process of experiential learning driving steps of increased commitment is an important element in explaining the evolution of these MNEs over time. Focusing on the role of acquisitions within internationalization processes, we illustrate our arguments with six case studies of Thai MNEs. On this basis, we discuss how the IPM can inform future research on emerging economy MNEs. Specifically, the IPM suggests focusing on the internal and external factors that may induce firms to accelerate their cycle of international learning and commitment, in particular the roles of networks, acquisitions, human resources, big step commitments, the home country institutional environment, and possible managerial biases.     

Estimating the price elasticity of demand in the London stock market

The hypothesis that demand curves for individual stocks slope downwards is typically investigated by empirical analysis of stock price movements following events that cause shifts in demand or supply. However, it is difficult to attribute observed price movements between downward sloping demand curves and information conveyed by the event. In this paper an econometric approach, based on market-maker response to unexpected changes in inventory, is used to separate out the slope of the demand curve from information effects and estimate the slopes of the demand curves for twenty stocks included in the Financial Times-Stock Exchange 100 Share Index (FTSE100). The analysis suggests that downward sloping demand curves would decrease the price by about 7.5% for a 1% increase in the number of outstanding shares.     

Skew Brownian Motion and Pricing European Options

Abstract

The volatility smile and systematic mispricing of the Black–Scholes option pricing model are the typical motivation for examining stochastic processes other than geometric Brownian motion to describe the underlying stock price. In this paper a new stochastic process is presented, which is a special case of the skew-Brownian motion of Itô and McKean. The process in question is the sum of a standard Brownian motion and an independent reflecting Brownian motion that is similar in construction to the stochastic representation of a skew-normal random variable. This stochastic process is taken in its exponential form to price European options. The derived option price nests the Black–Scholes equation as a special case and is flexible enough to accommodate stochastic volatility as well as stochastic skewness.     

中国成品油市场月度分析

回顾 1.需求 9月份,中国固定资产投资及工业增加值同比增速继续放慢,但采矿、冶金、制造业、交通等主要耗能行业的投资和生产增长依然旺盛,而且出口增长强劲,推动石油需求继续走高.估计当月石油平均消费水平上升到约93.96万吨/日,同比增长6.91%.成品油消费逐步走向旺季,其中汽油需求随着运输、旅行等活动的日益增加,特别是"十一"长假期的临近,比上月有明显增长;而柴油需求也随着从南到北逐步进入"三秋"农忙季节以及沿海渔期生产活动的恢复开始走向秋季消费高峰.月中台风"姗姗"在渤海、黄海登陆,对华东、华北、东北沿海地区渔业、农业、基建和运输业造成一定程度的影响,不仅降低了部分油品需求,而且还造成油品出港不畅及到港缓慢.估计9月份国内汽油需求达到14.53万吨/日,比上月上升4.54%,同比增长3.66%;柴油需求为31.96万吨/日,比上月上升1.17%,同比增长7.48%;需求的柴汽比为2.17(见表1).