The use (and misuse) of bonding for control of static ignition hazards

In this paper, specific procedures to minimize potential hazards related to the accumulation of static electricity are addressed. The hazards of concern herein are those arising from the ignition of mixtures of air and flammable gases, vapors, and dusts. Accordingly, concerns related to process operability, sensitivity or reliability of electronic components, or nuisance effects are not considered. Also, ignition of condensed phase explosives or oxygen enriched systems are not specifically included through many of the principles and conclusions discussed below will apply.     

CIL's experience with a computerized ammonia plant trip system

The computerized trip system has been in use since August, 1985, at the CIL Ammonia II plant. Superior reliability, essential avoiding unnecessary shutdowns, while protecting the plant from accident, is obtained through use of a fault-tolerant configuration.     

The Influence of Children on Family Life Cycle Spending Behavior: Theory and Applications

This study examines the effect of children on family consumption decisions during different stages of the life cycle. An empirical model that incorporates both continuous measures of adult equivalence and a flexible functional form is used. Results indicate that durables, food eaten (purchased) away from home, and adult clothing are luxury goods for two-child families. Economies of scale are noted for food and shelter expenditures. Two-child families substitute out of expenditures for meals eaten away from home, adult clothing, and other goods and services to meet increased demand due to the children's presence.     

Trading frequency and event study test specification

We examine the effects of thin trading on the specification of event study tests. Simulations of upper and lower tail tests are reported with and without variance increases on the event date across levels of trading volume. The traditional standardized test is misspecified for thinly traded samples. If return variance is unlikely to increase, then Corrado's rank test provides the best specification and power. With variance increases, the rank test is misspecified. The Boehmer et al. standardized cross-sectional test (Event-study methodology under conditions of event-induced variance, Journal of Financial Economics 30, pp. 253–272) is properly specified, but not powerful, for upper-tailed tests. Lower-tailed alternative hypotheses can best be evaluated using the generalized sign test.     

河北省外向型经济发展的战略构想

目前河北省的外向型经济，无论对外开放方面，还是对内开放方面，都还比较落后，对全省经济发展的拉动力较弱，促进河北省外向型经济发展，应根据本省的实际情况大力发展劳动密集型产业，发挥外销产品的比较优势，加快高新技术产业的发展步伐，努力实现贸易方式、引资方式和引资结构的多元化；应根据我国和国际的经济战略调整，精心研究制定我省的外向型经济发展战略，并积极改善投资环境。     

Success Factors in Product Innovation: A Selective Review of the Literature

In today's increasingly competitive climate, more and more managers are having to update themselves on the range of factors that determine product innovation success. Such successes can be measured at the project (product) level or at the program level. Axel Johne and Patricia Snelson have prepared a review of factors associated with achieving success in a high proportion of recently developed new products. The authors address practical questions, such as the following: To what extent can product innovation be planned? Should development tasks be scheduled sequentially or in parallel? What is the proper degree of formality in effective new product decision making? What are the optimal organizational arrangements? The article concentrates on recent writings, drawing chiefly from journal articles published after 1980, including a large number from the Journal of Product Innovation Management. Factors contributing to success are ordered according to the now well-known McKinsey 7 Ss framework popularized by Peters and Waterman in their book In Search of Excellence. Detailed development tasks are considered according to the schema advanced by Crawford in his book New Products Management.     

The role of performance appraisals in motivating employees

Workers' rewards and career perspectives often depend on how their supervisors perceive their performance. However, evaluating a worker's performance is often difficult. We develop a model in which a worker is uncertain about his own performance and about his supervisor's ability to assess him. The supervisor gives the worker a performance appraisal aiming to affect both the worker's self‐perception and his own credibility in assessing the performance. We examine how performance appraisals affect the worker's future performance. Our model's predictions are consistent with empirical findings. Supervisors give, on average, “too” positive appraisals, and both positive and negative feedback can (de)motivate workers.     

Do ongoing networks block out new friends? Reconciling the embeddedness constraint dilemma on new alliance partner addition

Research Summary: This study addresses a theoretical dilemma regarding how alliance network constraint (reflected by network cohesion) affects a firm’s alliance formation with new partners. Using a network pluralism approach, we separate a firm’s ego alliance network into two activity‐based networks—an exploratory network and an exploitative network—based on the primary value chain activity involved in each alliance. We argue that the cohesion of exploratory or exploitative networks has an inverted U‐shaped effect on the addition of new partners in the same activity‐based network, and a positive effect on the addition of new partners in the other network. Results based on data from the biotechnology industry largely support our predictions with one exception. Our study contributes to both scholarly understanding of network embeddedness and alliance practice. Managerial Summary: The structure of firms’ ongoing alliance networks may have paradoxical implications for their efforts to search for and form alliance with new partners. That is, when a firm’s alliance partners are tightly connected with each other, the cohesive network tends to both encourage and impede the focal firm to add new partners. We resolve this dilemma by showing that when a firm is deeply entrenched in a cohesive alliance network conducting a certain type of activities (e.g., R&D activities), it may not easily add new R&D alliance partners. However, it may still be able to escape from the cohesive R&D alliance network by seeking new partners conducting other activities (e.g., manufacturing activities).