A review of research on techniques for lifting low-lying objects: 1. Criteria for evaluation

Advice and training on techniques for lifting is frequently provided. The choice of which technique to use should be based on the evidence available on a number of criteria. Important criteria include: psychophysical, physiological, biomechanical, psychological, performance and clinical. However few professionals have the time to read all the original research required to understand the limitations of the available criteria. The purpose of this paper was to present an accessible synthesis of the criteria used to choose a specific technique. Each criterion is described and its validity discussed to provide the reader with a better understanding of the criteria, and thus the evidence available.     

Quality Provision with Heterogeneous Consumer Reservation Utilities

This study examines a firm's quality and price decisions when consumers differ not only in their willingness‐to‐pay for quality but also in their reservation utility for the basic product. We find that while the firm offers lower‐quality products when consumers' valuations for quality deteriorate, the optimal quality may increase with a negative shift in consumers' reservation utilities. We also investigate the optimal price and quality of the products within a vertically differentiated product line when the number of products is exogenously given. The existing literature shows that when consumers differ only in their willingness‐to‐pay for quality, the firm sets the efficient quality for consumers with the highest valuation for quality, whereas the concern for cannibalization pushes down the quality of inferior products. We find that when consumers are heterogeneous in both their reservation utility and valuation for quality, the concern for cannibalization may distort the quality upwards, even for consumers with the highest willingness‐to‐pay for quality. In addition, a low‐quality product may enjoy a higher profit margin than a high‐quality product within the product line.     

A business version of the prisoner’s dilemma: A teaching technique

The “prisoner’s dilemma” is an archetypal choice dilemma widely used for teaching and research in the social sciences. A version of the prisoner’s dilemma which set the problem in an ordinary business context was used as a pedagogic instrument with graduate business students, fully employed and aspiring to upward mobility, and nurses—both male and female—employed at various supervisory levels. The site was a college in metropolitan Detroit. The method engages students in verbal expression, explanation, and justification of their choices and thus departs from mainstream research which treats the prisoner’s dilemma mainly in mathematical terms, usually based upon experiments requiring many iterative choices. Also, whereas the prisoner’s dilemma places the subjects in the frame of mind of being prisoners, this version is of choice-making by free people, with the additional unspecified choice available of not to play the game. Replication outcomes were similar enough to support tentative generalization, although statistical analysis was not significant because of the small number of cases. Results suggest that the method may be useful to managers in their analysis of ethical choice situations and development of alternate scenarios. Vivid lessons regarding the ethical dimensions of business behavior can be learned from the use of the prisoner’s dilemma.     

Time,Rank, and Social Control*

Members of organizations treat time as something and scarce that may be possessed and traded and that is repeatedly the object of contracts. Observations in hospital Intensive Care Units show both formal patterns of greater time advantage for those of high rank and informal patterns of renegotiation and manipulation of time. Organizations can examine informal time use by members and select and promote those who willingly put in time for the organization. Putting in extra time for others can be used as an indicator of attitudinal conformity, which helps the organization assure behavioral compliance by the higher ranked, who are typically in less observable positions.