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.

Optimal Policies of Yield Management with Multiple Predetermined Prices

Abstract: It is a common practice for industries to price the same products at different levels. For example, airlines charge various fares for a common pool of seats. Seasonal products are sold at full or discount prices during different phases of the season. This article presents a model that reflects this yield management problem. The model assumes that (1) products are offered at multiple predetermined prices over time; (2) demand is price sensitive and obeys the Poisson process; and (3) price is allowed to change monotonically, i.e., either the markup or markdown policy is implemented. To maximize the expected revenue, management needs to determine the optimal times to switch between prices based on the remaining season and inventory. Major results in this research include (1) an exact solution for the continuous-time model; (2) piecewise concavity of the value function with respect to time and inventory; and (3) monotonicity of the optimal policy. The implementation of optimal policies is fairly facile because of the existence of threshold points embedded in the value function. The value function and time thresholds can be solved with a reasonable computation effort. Numerical examples are provided.

The relationship of early alliance ruptures and their resolution to process and outcome in three time-limited psychotherapies for personality disorders

Abstract: This study examined the relationship of early alliance ruptures and their resolution to process and outcome in a sample of 128 patients randomly assigned to 1 of 3 time-limited psychotherapies for personality disorders: cognitive-behavioral therapy, brief relational therapy, or short-term dynamic psychotherapy. Rupture intensity and resolution were assessed by patient- and therapist-report after each of the first 6 sessions. Results indicated that lower rupture intensity and higher rupture resolution were associated with better ratings of the alliance and session quality. Lower rupture intensity also predicted good outcome on measures of interpersonal functioning, while higher rupture resolution predicted better retention. Patients reported fewer ruptures than did therapists. In addition, fewer ruptures were reported in cognitive-behavioral therapy than in the other treatments. (PsycINFO Database Record (c) 2010 APA, all rights reserved).

The paradox of technological capabilities: a study of knowledge sourcing from host countries of overseas R&D operations

Abstract: We investigate the factors that influence the extent to which a multinational corporation's headquarters (MNC-HQ) sources knowledge from the host countries of its R&D labs. We propose that the technological capabilities held by MNC-HQs present a paradox. On the one hand, they enhance MNC-HQs' learning capabilities. On the other hand, they reduce MNC-HQs' motivations to outsource knowledge from host countries. We also argue that it is important to consider both relative and absolute levels of technological capabilities, because relative levels can influence MNC-HQs' motivations to source knowledge from host countries. Statistical findings generally support our arguments.

The Benefits of Gardening for Older Adults: A Systematic Review of the Literature

Abstract: This article systematically reviews evidence for gardening as a beneficial activity for older adults. The authors reviewed 22 articles that assessed the benefits of gardening for both community-dwelling and institutionalized older adults. Through various research designs (quantitative and qualitative) and measurements utilized, the results reveal that gardening can be an activity that promotes overall health and quality of life, physical strength, fitness and flexibility, cognitive ability, and socialization. The implementation of various aspects of gardening as health-promoting activities transcend contexts of practice and disciplines and can be used in urban and rural communities as both individual and group activities.