BIM在建设项目中应用模式研究

为了加强BIM(Building Information Modeling)在我国建筑业中应用,以及提高其应用效益,文章采用实例和比较法,对比分析现有BIM应用模式的缺陷、效用及执行情况.确定了较为适用的BIM应用模式,即建设单位驱动的BIM应用模式,并基于此模式提出了相应的推广与改进建议.通过BIM应用模式的分析表明,改进BIM可以较好地服务于我国建筑业.     

Infinite-variance,alpha-stable shocks in monetary SVAR

This paper outlines a theory of what might be going wrong in the monetary SVAR (structural vector autoregression) literature and provides supporting empirical evidence. The theory is that macroeconomists may be attempting to identify structural forms that do not exist, given the true distribution of the innovations in the reduced-form VAR. This paper shows that this problem occurs whenever (1) some innovation in the VAR has an infinite-variance distribution and (2) the matrix of coefficients on the contemporaneous terms in the VAR's structural form is nonsingular. Since (2) is almost always required for SVAR analysis, it is germane to test hypothesis (1). Hence, in this paper, we fit α-stable distributions to the residuals from 3-lag and 12-lag monetary VARs, and, using a parametric-bootstrap method, we reject the null hypotheses of finite variance (or equivalently, α = 2) for all 12 error terms in the two VARs. These results are mostly robust to a sample break at the February 1984 observations. Moreover, ARCH tests suggest that the shocks from the subperiod VARs are homoskedastic in seven of 24 instances. Next, we compare the fits of the α-stable distributions with those of t distributions and a GARCH(1,1) shock model. This analysis suggests that the time-invariant α-stable distributions provide the best fits for two of six shocks in the VAR(12) specification and three of six shocks in the VAR(3). Finally, we use the GARCH model as a filter to obtain homoskedastic shocks, which also prove to have α < 2, according to ML estimates.     

SOX and the regulated firm

We investigate the initial and long-term market reactions in three regulated industries to the debate and ultimate passage of Sarbanes–Oxley (SOX) legislation. We argue that market reactions may differ for regulated industries relative to the broad market based on perceived differences in the costs and benefits from the legislation. Our results indicate that the initial reaction to the passage was more positive for regulated firms compared with non-regulated firms. These results are generally consistent with a compliance cost based explanation, although the underlying motivation for the results differs across industries. However, over longer post-SOX holding periods, the regulated samples outperformed the S&P 500 but underperformed their matched samples. Lower longer-term accounting profits in terms of ROA argue against significantly lower compliance costs associated with SOX.     

Performance and persistence of Commodity Trading Advisors: Further evidence

We re‐examine the performance of Commodity Trading Advisors (CTAs) over the January 1995 to October 2008 period. We compare abnormal performance based on a number of alternative existing models, as well as a category‐specific model introducing asset‐, option‐, and moments‐based factors. Taking more factors into account significantly raises the explanatory power, and 9 out of 12 CTA categories significantly outperform the market. We find that numerous CTAs show persistence over a horizon of at least three months and they are also more likely to be persistent over a longer period. Yet, most of the persistence fades away upon the “acid test” of considering only the top and bottom quartiles of CTAs. © 2009 Wiley Periodicals, Inc. Jrl Fut Mark 30:725–752, 2010     

新月楼盘——离子艺术创造的标识和雕塑形成了新的发展形态

德克萨斯州的奥斯汀市被称为全球现场音乐之都,但许多其他设施使它成为一个适合居住的地方。这座城市及其周边环境提供了一个美丽的地形,德州的中部和西部有许多山脉,河流和湖泊。但是,更重要的是职业发展机会,一个一流的大学和公共教育系统,以及相对而言负担得起的住房提升了奥斯汀市在美国城市生活质量排名单上的位置。     

Government and managerial influence on auditor switching under partial privatization

We investigate how auditor switching is affected by government influence, misalignment between type of auditor (government vs. private) and type of controlling shareholder (government vs. private), and misalignment between an incumbent auditor and imputed preferences of managers in a market characterized by continued substantial government ownership in listed entities. We exploit a natural policy and regulatory experiment in Iran that allows us to investigate what happens when previously government-owned entities are partially privatized as listed entities where, in many cases, the government retains significant ownership interests. At the same time, there were significant changes in the audit market, resulting in large increases in the number of private sector auditors competing for previously state-administered audits. We find the likelihood of auditor switches is strongly associated with measures of misalignment between type of auditor and type of controlling shareholder and auditor–managerial misalignment, but these associations are constrained by significant government influence. Exposing the constraining effect of significant government influence on auditor switching is an important contribution to our understanding of privatizations, government shareholder influence and auditor choice. These results have implications for policy development in other emerging and transition economies where privatization remains largely partial, and competition among private sector auditors is still emergent.     

Assessing Managers’ Ethical Decision-making: An Objective Measure of Managerial Moral Judgment

Recent allegations of unethical decision-making by leaders in prominent business organizations have jeopardized the world’s confidence in American business. The purpose of this research was to develop a measure of managerial moral judgment that can be used in future research and managerial assessment. The measure was patterned after the Defining Issues Test, a widely used general measure of moral judgment. With content validity as the goal, we aimed to sample the domain of managerial ethical situations by establishing links to dimensions of managerial performance, as well as to the types of organizational justice issues managers encounter. Proposed scenarios were evaluated for realism by ethics officers and human resource managers. Results indicated that the new measure is reliable and correlates with a number of relevant variables in the hypothesized manner, demonstrating evidence of construct validity. Implications for future research and for human resources management are discussed.     

Ethical Ideologies and Older Consumer Perceptions of Unethical Sales Tactics

Demographic differences among consumer groups have become increasingly important to the development of marketing strategies. Marketers depend heavily on the sales force to implement strategies at the consumer level and, not surprisingly, different groups may view the salesperson’s role differently. Unfortunately, unethical sales practices targeted at various consumer groups, and especially at seniors, have been utilized as well. The purpose of this study is to provide initial empirical evidence of the ethical ideological make-up of four age segments outlined by Strauss and Howe (1991, Generations: The History of America’s Future 1584–2069, Morrow, New York) and to examine the propensity for these groups (seniors, in particular) to respond differentially to potentially unethical sales tactics. Data were collected from 179 respondents representing the four generational age groups. MANOVA revealed that the seniors in this study were distinct with respect to ethical ideology and less accepting of unethical sales tactics. Managerial implications are discussed for sales organizations to maximize their effectiveness across consumer groups. Rosemary P. Ramsey (Ph.D., University of Cineinnati) is Professor of Marketing in the Raj Soin College of Business at Wright State University, Dayton, OH, USA. Rosemary spent several years as a marketing and sales practitioner in the private sector, primarily for NCR Corporation. She is interested in relationship development as it pertains to buyer-seller interactions, salespersons with their sales managers, and team dynamics. She has been on the faculty at University of Kentucky and University of South Florida. She was in administration at Eastern Kentucky University, Cleveland State University, and Wright State University. She is published in the Journal of the Academy of Marketing Science, Journal of Retailing, Journal of Business Research, Journal of Personal Selling & Sales Management, among others. She was recently honored by Who’s Who among America’s Teachers and Who’s Who in Executives and Professionals. Greg W. Marshall (Ph.D., Oklahoma State University) is Professor of Marketing and Strategy in the Roy E. Crummer Graduate School of Business at Rollins College, Winter Park, FL, USA, Greg’s research centers on the areas of sales force selection, performance, and evaluation; adoption and successful use of technology by salespeople; sales force diversity; decision making by marketing managers; and intraorganizational relationships. He is Editor of the Journal of Marketing Theory and Practice. His industry experience includes thirteen years in selling and sales management, product management, and retailing with companies such as Warner Lambert, Mennen, and Target Corporation. He is a frequent consultant and trainer in the area of strategic marketing. Greg serves on the editorial review boards of the Journal of the Academy of Marketing Science, Journal of Business Research, and Industrial Marketing Management.He is co-author of the books, Sales Force Management 9e and Relationship Selling and Sales Management 2e, both published by McCraw-Hill, and Marketing: Real People, Real Choices 5e, published by Prentice Hall. Mark W Johnston (Ph.D., Texas A&M University) is the Alan and Sandra Gerry Professor of Marketing and Ethics at the Roy E. Crummer Graduate School of Business at Rollins College, Winter Park, FL, USA. Mark has conducted a number of seminars around the world on a variety of topics including ethical issues in marketing, sales force motivation, managing turnover in the organization, sales training issues, and improving overall sales performance. He has served as a marketing consultant to a number of organizations around the country. A partial list of his research includes publications in theJournal of Marketing Research, Jotunal of Applied Psychology, Journal of Business Research, and Journal of Personal Selling & Sales Management. He is co-author of the books Sales Force Marnagement 9e and Relationship Selling and Sales Management 2e, both published by McGraw-Hill. Dawn R, Deeter-Schmelz (Ph.D., University of South Florida) is Chair and O’Bleness Professor of Marketing at Ohio University, Athens, OH, USA. Her research interests include customer service teams, sales management and buyer-seller relationship issues, business-to-business e-commerce, and scale development. She has published in Journal of the Academy of Marketing Science, Journal of Marketing Theory and Practice, Industrial Marketing Management, Journal of Personal Selling & Sales Management, Journal of Marketing Education, and Journal of Business Logistics, among others. In a marketplace where the consumer is King ... understanding the fundamental needs, values, icons and historical experiences of the various generations is more critical than ever. Generational mindsets and feelings are major factors in determining ...an effective marketing strategy. —Fishman (2004), p. 4