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61.
Using data from the 1980 National Election Study, we examinethe claims (1) that those voters who shifted to Ronald Reaganin 1980 ("New Republicans") were drawn disproportionately fromthe lower to middle strata of the population: (2) that theywere social conservatives motivated by issues like abortionand ERA: and (3) that they were more religious and alienatedfrom the federal government than average. Our results stronglysuggest that all of these assertions are false and thus questionthe emergence of a "neopopulist" or "Middle American Radical"political constituency on the right wing of American politics.Our findings also have implications for prominent theories aboutconservative political movements and about the changing natureof party politics in a postindustrial society. 相似文献
62.
Claudia Bazzani Vincenzina Caputo Rodolfo M. Nayga JR. Maurizio Canavari 《Economic inquiry》2017,55(1):383-396
In choice experiments, it is commonly assumed that individuals make choices in static and certainty decision‐making conditions. Real‐world choices, however, are usually made in a dynamic setting. Committing a purchase decision under conditions of uncertainty might have a “Commitment Cost” (CC). In this study, we test CC theory using a nonhypothetical choice experiment. Specifically, we test whether choice behavior and willingness to pay estimates differ when individuals have the option to gain present or delayed information or reverse the transaction. Our results suggest that the construction of a dynamic decision context can be relevant in the design of choice experiments. (JEL C90, C93, Q18) 相似文献
63.
EVALUATING THE EFFECTIVENESS OF CHILD SAFETY SEATS AND SEAT BELTS IN PROTECTING CHILDREN FROM INJURY
Young children are required to use child safety seats, and the age threshold at which children can legally graduate to seat belts has steadily increased. This article tests the relative effectiveness of child safety seats, lap‐and‐shoulder seat belts, and lap belts in preventing injuries among motor vehicle passengers aged 2–6 yr. We analyze three large, representative samples of crashes reported to police, as well as linked hospital data. We find no apparent difference in the two most serious injury categories for children in child safety seats versus lap‐and‐shoulder belts. Child safety seats provide a statistically significant 25% reduction in the least serious injury category. Lap belts are somewhat less effective than the two other types of restraints but far superior to riding unrestrained. (JEL I18) 相似文献
64.
Integrated manufacturing operations typically are organized along hierarchical lines. Characterized by product aggregation and time horizon, hierarchical decompositions aim at easing problems associated with the complexity and scale of the manufacturing function taken as a whole. Static models have been developed and employed which facilitate the analysis and functioning of these organizations. Existing models are valuable aids in assisting goal-planning functions, but provide little guidance for directing the pursuit of goals. This paper presents a new hierarchical model of integrated manufacturing operations based on concepts of management control. The model is congruent with commonly used static planning models, while at the same lime depicting real-time, goal-achievement efforts within a dynamic operating environment. Emphasizing the interactions between goal planning and goal achievement, the dynamic model provides a means of assessing the effects of decentralization and autonomy on the goal planning and achievement process. The model is used to identify two resource-consuming chain reactions linked to replanning and goal pursuit within the hierarchy. A simple example based on the dynamic extension of a typical static decomposition illustrates the key findings. 相似文献
65.
Carolyn J. T. Halpern J. Richard Udry Chirayath Suchindran Benjamin Campbell 《Journal of sex research》2013,50(4):327-332
This paper compares contemporaneous and retrospective reports of adolescent masturbation experience, partnered sexual behavior, and nonsexual problem behavior. Analyses are based on data from 59 White males who were followed for 3 years in early adolescence and later reinterviewed as young adults. Comparisons of adolescent and adult reports about adolescent behavior indicated that adolescent masturbation, but not coitus and wet dreams, was more likely to be reported in young adulthood than in adolescence, even when confidential reporting techniques were used. In contrast, nonsexual problem behavior occurring during adolescence was more likely to be reported in adolescence than in early adulthood. These findings are consistent with other literature indicating that masturbation is a distinctly sensitive behavior that adolescent respondents may be particularly reluctant to report. These results suggest that adult retrospective reports may more accurately represent adolescent masturbation activity, but may underrepresent adolescent nonsexual problem behavior. 相似文献
66.
Does a helping hand put others at risk?: affirmative action,police departments,and crime 总被引:1,自引:0,他引:1
JR Lott Jr 《Economic inquiry》2000,38(2):239-277
Will increasing the number of minority and women police officers make law enforcement more effective by drawing on abilities that have gone untapped and creating better contact with communities and victims? Or will standards have to be lowered too far before large numbers of minorities and women can be hired? Using cross‐sectional time‐series data for U.S. cities for 1987, 1990, and 1993, I find that hiring more black and minority police officers increases crime rates, but this apparently arises because lower hiring standards involved in recruiting more minority officers reduces the quality of both new minority and new nonminority officers. The most adverse effects of these hiring policies have occurred in the areas most heavily populated by blacks. There is no consistent evidence that crime rates rise when more women are hired, and this raises questions about whether norming tests or altering their content to create equal pass rates is preferable. The article examines how the changing composition of police departments affects such measures as the murder of and assaults against police officers. 相似文献
67.
Carolyn Tucker Halpern Rosalind Berkowitz King Selene G. Oslak J. Richard Udry 《Journal of research on adolescence》2005,15(4):535-559
Romantic relationships constitute an important, but understudied, developmental context for accommodation to pubertal change. Using a nationally representative sample of 5,487 black, white, and Hispanic adolescent females, this study examined associations among body mass index, current romantic involvement, and dieting. For each one point increase in body mass‐index (BMI), the probability of having a romantic relationship decreased by 6%. Further, involvement in a nonsexual romantic relationship—but not involvement in a sexual romantic relationship—was associated with a significant increase in the likelihood of dieting. Associations between relationship type and dieting did not vary by age, socioeconomic status, or race, but were stronger at higher BMIs. These findings confirm that weight has implications for romantic involvement, which is highly valued by adolescent girls, and that romantic relationships, in turn, are important contexts in which to consider psychological and behavioral accommodation to the physical changes of puberty. 相似文献
68.
69.
This paper investigates the behavior of a seller who has a preference for a certain group of customers. The seller maintains stable prices over time and supplements price rationing with a nonprice rationing. In this situation the preferred buyers would have priority over nonpreferred buyers in purchasing the commodity, and if the latter purchase the commodity they may be paying higher prices. It is proposed here that the premium paid by the nonpreferred buyers is a necessary bribe to induce the seller to forego his search for the preferred buyers. 相似文献
70.
Why is it that the problem of scheduling is so computationally difficult to solve? At last recent developments in modern mathematical complexity theory are providing some insights. The paper describes in essentially non-mathematical terms the computational technique known as the ‘Branch and Bound Method’. This, the best general optimising technique available for scheduling, is also shown to have its limitations. It now appears that efficient computational and optimising algorithms are unlikely ever to be found for all except special cases of the general industrial scheduling problem. It seems that heuristic (rule-of-thumb) methods leading to approximate solutions are likely to offer the only real promise for the future. 相似文献