非同类企业竞争与合作策略收益模型及风险分析

在比较同类企业竞争策略模型与合作策略模型的基础上,讨论了价格的信息作用,分析了合作策略收益更大和风险并不随之增加的原因。然后以现代决策理念为出发点,探讨了企业最大利润与企业条件的关系,提出了与企业单位变动成本和生产能力条件相适应的合理最大利润的概念,对“理性企业的假设”赋予了“追求与企业条件相适应的合理最大利润”的新含义。据此设计了非同类企业产量分配函数,建立了适用性更广的非同类企业合作策略最佳收益模型,并给出了随市场价格变化的企业最佳应对策略。最后用1个算例来直观体现合作策略的优势。     

The Expectation-Threshold model of reproductive decision making

It is proposed that as expectations about parenting become increasingly high, couples have an increasing tendency to decide to have a(or another) child. Similarly, as parenting expectations become increasingly low, couples have an increasing tendency to decide on sterilization. Couples without extremely high or low expectations continue to use contraceptives. Expectations are defined as Subjective Expected Utilities (SEUs) for having or not having a child. Preliminary results support the model and suggest that the threshold for making these decisions is not at neutral, but is conservative so that couples must have fairly high or low expectations before making such binding decisions are parenting or sterilization. The fact that data reveal that this exists supports the Expectancy-Threshold model, but it also requires a change in SEU Theory's maximization rule for some kinds of decisions.The authors wish to thank Carole Baker, former executive Director of the National Alliance for Optional Parenthood, and the board members of that organization for their cooperation, and Dr. Barbara Beach who helped with the data analysis. Funding was provided, in part, by The Center for Studies in Demography and Ecology, University of Washington, through a grant, No. 5 P30 HDO 9397, from the National Institute for Child Health and Human Development     

The Household Encyclopedia as Magic Kit: Medieval Popular Interest in Pranks and Illusions*

Each of us has wished at some time to send in three box tops andget a magic kit that contains itchingpowder to give to our enemies, instructions for tricks designed to baffle our friends, and potions to make us more desirable. Exactly so in the Middle Ages. Bruno Roy's delightful essay on medieval do-it-yourself magic reveals the strong popular interest in practical jokes, illusions and tricks. People in the Middle Ages were playful and high-spirited, waiting to entertain and be entertained. The transformative power implicit i n the tricks played by jugglers or entertainers appealed to all classes of society; these same jugglers not only dealt in illusory tricks but often used various chemicalpreparations, giving a “scientific” cast to their pranks. That so many of these tricks were related to the household in terms of the joke itself or the ingredients used suggests the widespread popularity of magic kits, a popularity that today perhaps resides only with the children who save the box tops.     

The importance of innovation leadership in cultivating strategic fit and enhancing firm performance

This study examines the importance of innovation leadership in cultivating the strategic fit of an organization with its environment, and enhancing various economic, relationship, and product performance outcomes. It thus explores how innovation leadership enables a firm to change and adapt to its external environment and by implication enhance its performance. The results of data collected from 117 firms show that innovation leadership, both directly and through increased strategic fit, significantly enhances firm performance. Implications for research on strategic and innovation leadership and adaptive organizational systems are discussed.     

Maximizing Business Returns to Corporate Social Responsibility (CSR): The Role of CSR Communication

By engaging in corporate social responsibility (CSR) activities, companies can not only generate favorable stakeholder attitudes and better support behaviors (e.g. purchase, seeking employment, investing in the company), but also, over the long run, build corporate image, strengthen stakeholder–company relationships, and enhance stakeholders' advocacy behaviors. However, stakeholders' low awareness of and unfavorable attributions towards companies' CSR activities remain critical impediments in companies' attempts to maximize business benefits from their CSR activities, highlighting a need for companies to communicate CSR more effectively to stakeholders. In light of these challenges, a conceptual framework of CSR communication is presented and its different aspects are analyzed, from message content and communication channels to company- and stakeholder-specific factors that influence the effectiveness of CSR communication.     

创建佛山生态城市的几点思考

生态城市是城市发展的新理念和新趋向。创建佛山生态城市设想是:构建具有南亚热带城市风貌、绿地系统完善、人居环境舒适优美的城市生态景观,发展科技含量高、经济效益好、资源消耗低、环境污染少的现代生态农业和新型生态工业,形成富有时代气息、具有岭南特色、融入生态内涵的生态文化。并要以新理念为导向,以新规划为蓝图,以新一轮产业结构调整为契机,以新机制为保障,推进城市的生态转型和生态建设。     

A Robust Procedure in Nonlinear Models for Repeated Measurements

Nonlinear regression models arise when definite information is available about the form of the relationship between the response and predictor variables. Such information might involve direct knowledge of the actual form of the true model or might be represented by a set of differential equations that the model must satisfy. We develop M-procedures for estimating parameters and testing hypotheses of interest about these parameters in nonlinear regression models for repeated measurement data. Under regularity conditions, the asymptotic properties of the M-procedures are presented, including the uniform linearity, normality and consistency. The computation of the M-estimators of the model parameters is performed with iterative procedures, similar to Newton–Raphson and Fisher's scoring methods. The methodology is illustrated by using a multivariate logistic regression model with real data, along with a simulation study.     

Analysis of ordered probit model with surrogate response data and measurement error in covariates

ABSTRACT

Often in data arising out of epidemiologic studies, covariates are subject to measurement error. In addition ordinal responses may be misclassified into a category that does not reflect the true state of the respondents. The goal of the present work is to develop an ordered probit model that corrects for the classification errors in ordinal responses and/or measurement error in covariates. Maximum likelihood method of estimation is used. Simulation study reveals the effect of ignoring measurement error and/or classification errors on the estimates of the regression coefficients. The methodology developed is illustrated through a numerical example.     

Progressively censored tests for clinical experiments and life testing problems based on weighted empirical distributions

In the context of time-sequential studies, progressively censored tests for a simple regression model based on weighted empirical distributions are considered for ungrouped as well as grouped data situations. Early decision rules based on such tests are formulated. The asymptotic theory of the proposed tests rests on a construction of suitable empirical processes and their convergence (in distribution) to appropriate Gaussian functions. Critical values of the proposed test statistics are obtained by simulation, For a hypothetical example (of practical interest), a comparative study is made for the empirical powers and stopping times for some rival tests.     

Bayes estimators of the average failure rates

In the present paper we have proposed a Bayesian approach for making inferences from accelerated life tests which do not require distributional assumptions