Long Island University

About: Long Island University is a education organization based out in Brookville, New York, United States. It is known for research contribution in the topics: Population & Context (language use). The organization has 2647 authors who have published 4924 publications receiving 108757 citations.

Technical Note—A Risk-Sensitive Model for Managing Perishable Products

Abstract: This article presents a risk-sensitive model for managing perishable products assuming the supplier is averse to the variation of revenues. While traditional risk-neutral revenue management models offer optimal strategies in the long run, they are exposed to the variation of revenue flows. If a short-term revenue target is a primary concern for the supplier, the risk-neutral assumption fails to provide the best policy needed. The proposed model uses an exponential function with a risk-sensitive parameter instead of the conventional risk-neutral objective. The risk parameter measures how the supplier is sensitive to the deviation of revenues. We show that the new objective function captures the supplier's risk behavior. We develop a recursive procedure for the optimal solution in closed form. The optimal policy has attractive properties such as nested active price set, monotonicity with respect to the remaining time and inventory, and threshold-type control. When the supplier is more sensitive to the uncer...

Attitudinal, Social, and Practical Correlates to Fitness Behavior: A Test of the Theory of Planned Behavior

Abstract: Srr,nmary.-Professional management personnel (N=73) who exercise were studied to assess the efficacy of the theory of ~lanned behavior in predicting intention to exercise and amount of exercise. Four rating scales were used for the assessment of attirude toward fitness, subjective norm, perceived behavioral control, and intention to exercise. In addition, frequency of exercise was measured and recorded for five months. aerarchical mulriple regression analyses indicated that 26.6% of the variance of inrention to exercise was contributed by both fitness attirude and subiective norm, with the unique contribution of attitude toward fitness (part r = .36) slightly greater than that of subjective norm (part r = 33). 8% of the unique variance of exercise was explained by intention to exercise. Hierarchical multiple regression analyses also indicated that perceived behavioral control did not account for a significant variance in intention to exercise but did account for a significant variance in amount of exercise (R~ change= ,211. In the environment in which it was tested, results support the theory of planned behavior for understanding the exercise behavior of professional management personnel who exercise. Less than 40% of first-year participants in fitness programs continue into the second year. In comparison, more than 80% of third- and fourthyear participants and more than 90% of participants who exercise longer than four years continue to renew their memberships (Kerner, 1993a). Of those first-year participants who choose not to continue, almost 50% cite reasons that may be grouped as perception of a lack of control. Consequently, the effectiveness of adult fitness programs is hampered by a considerable number of persons who are unwilhg or unable to participate regularly in physical activity, especially in [he initial period. Although exercise programs vary widely, it is typical to expect as much as a 40 to 50% dropout rate within the initial six months to first year of membership (Dishman & Sallis, 1994).