浅析建筑企业施工管理费费率的确定

建设工程工程量清单计价规范(GB50500-2008)已于2008-12-01正式实施,规范对清单模式下的投标抱价活动中相关术语做了相应界定,其中将标底正式更正为招标控制价。招标控制价的界定,为招投标活动的合理有效进行铺平了道路。对投标人来说,接踵而来的是投标报价让利问题。如果投标人对自己施工过的项目的管理费用没有具体的量化指标,在施工竟标中将处于劣势。本文站在投标人立场,讨论施工企业管理费率的合理确定问题。     

Was there too little entry during the Dot Com Era?

We present four stylized facts about the Dot Com Era: (1) there was a widespread belief in a Get Big Fast business strategy, (2) the increase and decrease in public and private equity investment was most prominent in the Internet and information technology sectors, (3) the survival rate of dot com firms is on par with or higher than other emerging industries, and (4) firm survival is independent of private equity funding. To connect these findings we offer a herding model that accommodates a divergence between the information and incentives of venture capitalists and their investors. A Get Big Fast belief cascade could have led to overly focused investment in too few Internet startups and, as a result, too little entry.     

Wage expectations in northern and southern Italian regions: An interpretation based on psychological and social factors

Individual wage expectations of Italian unemployed are studied. The analysis is carried out separately for the North‐Central and southern Italian regions using semiparametric additive models. Results show a marked difference in expectations formation across regions. We argue that as far as the labour market information in the South is less diffuse and more ambiguous than in the North, the divergence between the econometric model based on a utility‐maximisation mainstream theory and the actual wage expectation mechanism may be large. A tentative explanation based on psychological and social factors is offered.     

GB 12497-1995与GB／T12497-2006三相异步电动机经济运行判别方法比较

三相异步电动机耗电量占全国总用电量的60％以上。我国早在1990年就发布了GB12497—1990《三相异步电动机经济运行》国家强制性标准,又分别在1995年和2006年进行了两次修订。1995版标准与2006版标准在三相异步电动机经济运行判别模型和电动机在偏离额定电压工作时对综合效率补偿方法有较大的不同。文章就上述两个问题进行了比较分析,并进行了实际测量。     

对修订后的GB17930-2011《车用汽油》标准的研究

通过对GB19730---2011《车用汽油》标准的解读,解析了标准的修订内容,指出了第Ⅲ与第Ⅳ阶段汽油技术指标的主要差异;阐述了标准的颁布缩小了与先进国家在车用汽油技术指标上的差距,为规范和提高我国车用汽油的质量提供了依据;分析了标准的实施对炼油企业汽油的生产及检验带来的影响。     

On the duality between prior beliefs and trading demands

In an abstract model with asymmetric information, we show that there is a duality relationship between the prior beliefs and trading demands of bets for any given individual. Then we aggregate all the agents to obtain a second duality relationship between common prior beliefs and trading possibilities. We easily derive from these relationships the no trade theorem and its converse. General efficiency results can be obtained. Moreover, our framework is sufficiently general to cover special cases proved previously (for example, Econometrica 62 (1994) 1327; Discussion Paper 83, Center for Rationality and Interactive Decision Theory, The Hebrew University of Jerusalem, 1995; J. Econom. Theory 91 (2000) 127; Games Econom. Behav. 24 (1998) 172. Yet, our arguments are both simple and intuitive.     

企业资金紧张的原因及对策

企业资金紧张的原因及对策田山河目前，资金紧张是企业普遍存在的一个严峻问题，债务越滚越大，严重影响和制约了企业正常的生产经营活动。如何适应市场经济，强化资金管理，摆脱资金困境，加速资金周转，提高经济效益是摆在企业面前的一个十分重要的课题。一、资金短缺为...     

Ergodic properties of conditional forecast functions of stable systems

Summary This paper analyzes the behavior of conditional forecast functions in stable systems. We study convergence of optimal forecast functions, of forecast functions obtained by conditioning on previous values, and conditional and joint densities.The research was done as part of the author's master thesis under Mordecai Kurz. The author thanks Mordecai Kurz, Carsten Nielsen, and Ho-Mou Wu for a careful reading of the paper and the Statistics Department of Stanford University for financial support. This research was supported in part by Fondazione ENI Enrico Mattei of Milan, Italy.     

日本企业家与中国古代思想

日本企业家与中国古代思想李占成撰文说，许多人都在称赞日本人的能干，至于能干的奥秘在哪里不是所有的人都清楚了的。现举出一些日本企业家学中国的实例，可知其一些渊源关系，同时也给那些认为自己不行，什么都是外来好的人以启发，借以增强自己的自尊心。新井正明是日...     

Separating uncertainty from heterogeneity in life cycle earnings

This paper develops and applies a method for decomposing crosssection variability of earnings into components that are forecastableat the time students decide to go to college (heterogeneity)and components that are unforecastable. About 60% of variabilityin returns to schooling is forecastable. This has importantimplications for using measured variability to price risk andpredict college attendance.