Production control systems for small group production

Experience with small group production systems has shown that mere change of layout and introduction of groups on the shop floor do not achieve the main objectives and possible advantages of groups, unless they are accompanied by certain changes in supporting services. Probably the most important changes are those required in production control. It is absolutely vital that the requirements and characteristics of the manufacturing system are taken into account when designing the production control system and vice versa. This paper outlines the problems and important factors affecting production control in a Group Technology (GT) environment, together with case studies which describe the operation of production planning and control systems used in two different organisations.     

Empirical evidence on the union free-rider problem: Do right-to-work laws matter?

This study provides detailed statistics by state, industry, occupation, and worker characteristics on private sector wage and salary workers covered by union collective bargaining agreements but who are not union members. A distinction is made between those workers who value the benefits of coverage more than the cost of membership, the true free riders, and those who do not, the induced riders. A probit union membership equation is estimated on a sample which excludes the covered nonmembers. Predicted probabilities are then calculated from the estimated model, yielding a quantifiable measure of the true free-rider problem. The author gratefully thanks Barry T. Hirsch, David A. Macpherson, and an anonymous referee for their constructive comments and insightful ideas. Any errors remain the sole responsibility of the author.     

SIMULATED MAXIMUM LIKELIHOOD APPLIED TO NON-GAUSSIAN AND NONLINEAR MIXED EFFECTS AND STATE–SPACE MODELS

The paper presents an overview of maximum likelihood estimation using simulated likelihood, including the use of antithetic variables and evaluation of the simulation error of the resulting estimates. It gives a general purpose implementation of simulated maximum likelihood and uses it to re‐visit four models that have previously appeared in the published literature: a state–space model for count data; a nested random effects model for binomial data; a nonlinear growth model with crossed random effects; and a crossed random effects model for binary salamander‐mating data. In the case of the last three examples, this appears to be the first time that maximum likelihood fits of these models have been presented.     

Physician executives explore "new science" frontier. Bridging the communications gap between medical staff and administration.

Physician executives are well positioned to take on a new leadership role: chief technology officer. Discover how you can combine your medical/scientific knowledge and business know-how to help usher in a new age of technological innovation.     

THE CLINICAL AND THEORETICAL IMPACT OF A CONTROLLED TRIAL OF FAMILY THERAPY IN ANOREXIA NERVOSA

The paper discusses the practical and theoretical implications of the results of a controlled treatment trial. Family therapy was compared with individual, supportive psychotherapy for the management of severe eating disorder. Family therapy was markedly more effective in achieving improvement in one of four subgroups of patients: (a): those with early onset, short duration; (b) early onset, duration more than 3 years; (c) late onset, after the age of 18 years; (d) those with bulimia nervosa. The therapies used are described, as are the changes in clinical practice arising from the study. Theoretical considerations concerning notions of family structure, the family life-cycle and symptomatic and family change are also discussed.     

The Political Economy of FEMA Disaster Payments

We find that presidential and congressional influences affect the rate of disaster declaration and the allocation of FEMA disaster expenditures across states. States politically important to the president have a higher rate of disaster declaration by the president, and disaster expenditures are higher in states having congressional representation on FEMA oversight committees. Election year impacts are also found. Our models predict that nearly half of all disaster relief is motivated politically rather than by need. The findings reject a purely altruistic model of FEMA assistance and question the relative effectiveness of government versus private disaster relief.