不确定性在团队授权与新产品开发业绩关系中的作用

一个最新的理论研究表明授权的作用取决于环境中不确定性的程度。在对212个新产品开发项目的定量研究中,发现了团队授权与创新速度之间显著性相关关系。对由技术新颖性和技术动态性这两个不同因素引起的技术不确定性作了区分。结果发现,团队授权和创新速度之间的关系被技术动态性所调节,而技术新颖性则不能。通过进一步的研究发现,在不确定性较低的情况下,无论来源于技术新颖性或技术动态性,团队授权和创新速度均呈U形函数关系。这说明在不确定性较低的情况下,要么完全授权,要么完全不授权或高层介入,都有利于提高创新速度。与之形成对应,在不确定性高的情况下,团队授权和创新速度之间的关系受技术新颖性和技术动态性的影响是不同的。当技术新颖性高时,团队授权和创新速度之间呈线性关系,而当技术动态性高时,二者呈反U形函数关系。对于后者,极高程度的团队授权并不加快创新速度。这些结果说明,应该根据研发项目的不确定性的不同来源与水平选择不同的团队授权策略。这些发现或许也表明,技术动态性比技术新颖性对不确定性有更重要的影响。     

A Framework and Case Study for Exposure Assessment in the Voluntary Children''s Chemical Evaluation Program

A conceptual framework is presented for conducting exposure assessments under the U.S. EPA's Voluntary Children's Chemical Evaluation Program (VCCEP). The VCCEP is a voluntary program whereby companies that manufacture chemicals of potential concern are asked to conduct hazard, exposure, and risk assessments for the chemicals. The VCCEP is unique in its risk-based, tiered approach, and because it focuses on children and requires a comprehensive consideration of all reasonably foreseeable exposure pathways for a particular chemical. The consideration of all potential exposure pathways for some commonly used chemicals presents a daunting challenge for the exposure assessor. This article presents a framework for managing this complicated process, and illustrates the application of the framework with a hypothetical case study. The framework provides guidance for interpreting multiple sources of exposure information and developing a plausible list of exposure pathways for a chemical. Furthermore, the framework provides a means to process all the available information to eliminate pathways of negligible concern from consideration. Finally, the framework provides guidance for utilizing the tiered approach of VCCEP to efficiently conduct an assessment by first using simple, screening-level approaches and then, if necessary, using more complex, refined exposure assessment methods. The case study provides an illustration of the major concepts.     

Discrepancy as a cue to actual and perceived deception

Discrepancy between information emitted by face and speech was examined in three modes of communication: truth, concealment, and deception. It was found that communications designed either to conceal or distort the truth (concealment and deception modes) appeared more discrepant than communications that revealed the truth, particularly when full speech rather than filtered speech was presented. In addition, there were weak but consistently positive correlations between discrepancy and judgment of concealment and deception. That is, senders who appeared more discrepant were more likely to be judged as concealing or distorting information, regardless of the mode in which they had actually communicated.     

Cooperation or conniving: How public sector rules shape the decision

To what extent will decision makers in the economy use their time, energy, and imagination to cooperate in production and productive exchange? To what extent will they instead devote their efforts toward simply redividing the economic pie to arrange bigger slices for themselves at the expense of others, and ultimately at the expense of the size of the pie? This paper explains the case to be made that added collectivization since 1960, embodied in the growth industries of regulation and tax collection, have significantly shifted entrepreneurial efforts nationally toward pie redividing and away from pie enlarging activities. Empirical evidence is provided to support this assertion.     

Fertility, labor force participation, and tastes: An economic psychology perspective

Economic and economic psychology models of wife's labor force participation and family size decisions are examined within the context of a marriage cohort. Among other results, it was found that tastes influence the demand for work and number of children, along with traditional economic determinants such as opportunity costs and income. Tastes have an especially strong impact when modeled as unobservables, in order to correct for measurement error. Further, the often observed empirical association between labor force participation and fertility is found to be spurious and not necessarily causal in nature. That is, labor force participation and fertility negatively covary largely as a consequence of common economic and taste antecedents and not due to reciprocal interactions. Hypotheses were tested using a new structural equation methodology.     

A network simulation for budgeting

One problem with budgeting is the deterministic nature of the tool, even for flexible budgets, that is being used to provide forecasts of a stochastic process. Budget simulation provides not only expected values but anticipated dispersion of budget data as well. The network model may provide the best framework for such a simulation.     

An isotonic regression algorithm

A ‘pooling sets’ type of algorithm is developed and shown to be valid for computing an isotonic regression function for a general quasi-order. The method is direct and intuitive. The algorithm works best when the quasi-order is complex and the objective function is nearly isotonic. An example is worked out in detail.     

Theoretical Trends in the Sociology of Occupations*

In order to determine the directions which the field of sociology of occupations has taken in recent years, a content analysis of articles on work and occupations in four general sociological journals and two specialized journals was completed for the years of 1976 to early 1982. Not surprisingly, there has been a rapid increase in the number of papers dealing with status and income attainment. Very surprisingly, there has been a near demise of papers en the professions. Another dominant trust has been the large number of articles on women and sex roles. Satisfaction and alienation at work and attempts at job redesign have also received increasing attention. Papers on other topics have received less concentrated attention. Moving beyond the results of the content analysis, the present work discusses unresolved theoretical issues and potential new directions for the content areas. It is suggested that even for sociologists who do not identify themselves as specialists in occupations, the occupational variable remains a dominant one in sociological analyses.