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111.
The homeless will readily list ailments they claim to have, yet they will also claim that such ailments are not a problem and do not warrant treatmente In an attempt to understand this apparent paradox, data from a sampLe of homeless individuals were re-analyzed from a social comparison perspective. It was hypothesized that increased entrenchment in homelessness (increased isolation from “nonhomeless” environments and further involvement in the homeless environment) — operationalized by longer time spent on the street and a greater number of street friends — would lead homeless individuals to alter their perceptions of what constitutes a problem worthy of treatment. Results supported this hypothesis, in direction, and in almost all tests conducted. The involvement of adaptation level theory in such a social comparison process and the implications for intelVention and treatment are discussed.  相似文献   
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The replacement of an existing product with a new one presents many challenges. In particular, uncertainties in a new product introduction often lead to extreme cases of demand and supply mismatches. This paper addresses inventory planning decisions for product upgrades when there is no replenishment opportunity during the transition period. We allow product substitution: when a company runs out of the old product, a customer may be offered the new product as a substitute. We show that the optimal substitution decision is a time‐varying threshold policy and establish the optimal planning policy. Further, we determine the optimal delay in a new product introduction, given the initial inventory of the old product.  相似文献   
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Some of the main features of Bandura's self-efficacy concept are presented. The importance of the concept to the work organization and to individual performance is discussed. A field study is described. The first part of the study involved the development of parallel versions of a scale to assess managerial self-efficacy. Data concerning the psychometric properties of the parallel version of the scale show that they are reliable and independent of social desirability. The second part of the study provided evidence of the relationships between scores on the managerial self-efficacy scale and supervisors’ ratings of managers’ performance. The results indicate that managerial self-efficacy correlates with work performance ratings.  相似文献   
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We examine the relative importance of tax rates and macroeconomic fluctuations in explaining the share of national adjusted gross income (AGI) reported by the top 0.5% of all taxpayers. Results indicate that cutting the top income or capital gains tax rate would increase the top AGI share but not by enough to increase revenues. The preponderance of evidence suggests that the top AGI share is affected more by the capital gains tax rate than by the income tax rate but that real gross domestic product fluctuations have even larger effects.  相似文献   
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Staphylococcus aureus is a gram-positive, enterotoxin-producing coccus. It is a hardy organism and known to survive over a wide range of water activities, pH values, and temperatures. The objective of this study was to model the survival or gradual inactivation of S. aureus ATCC 13565 in intermediate moisture foods (IMFs). Various initial concentrations (approximately 10(1), 10(2), 10(3), and 10(4) CFU/g) were used to inoculate three different IMFs (beefsteak, bread, and chicken pockets). Viable counts were determined up to 60 days using tryptic soy agar. Inoculum size did not influence the survival or gradual inactivation of S. aureus in these foods. The rate of change (increase or decrease) in log CFU/day was calculated for every consecutive pair of data points and by linear regression for each inactivation curve. Both consecutive pair and linear regression rates of change were fit to logistic distributions (with parameters alpha and beta) for each food. Based on the distribution parameters, survival or gradual inactivation of S. aureus was predicted by computer simulation. The simulations indicated an overall decline in S. aureus population over time, although a small fraction of samples in the consecutive pair simulation showed a slight population increase even after 60 days, consistent with the observed data. Simulation results were compared to predictions from other computer models. The models of Stewart et al., were fail-safe, predicting the possibility of significant growth only after > 3,000 days. The USDA pathogen modeling program predictions were found to be fail-dangerous, predicting declines at least four times faster than observed.  相似文献   
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St. Wolfgang College recently decided to change its health care plan. The administration took this action after just minimum consultation with the faculty. Consequently, the faculty is disheartened, seeing the action as a reflection of the college's top down decision making process and command culture. Faculty are in a quadary as to what they can do. Further, the administration of the college has largely rebuffed the faculty's efforts to increase its involvement in governance, rejecting a faculty reform effort. The college's president has a background primarily in administration at the secondary school level. Since assuming leadership he has focused on improving physical plant. He avows a mission of enhancing the college's academic reputation and has taken actions that he and the administration believe will achieve this goal, such as dismantling two year degree programs that primarily serve disadvantaged and minority students and providing extra funding to flagship programs.  相似文献   
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