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The peer context is a central focus in research on adolescent risk behaviors but few studies have investigated the role of the peer context in the perpetration of adolescent dating violence. This longitudinal study examined between-subjects and within-person contemporaneous and lagged effects of peer attributes, measured with social network analyses, on trajectories of dating violence perpetration and determined if effects varied by grade and/or sex of the adolescent. Data are from adolescents who participated in a five-wave panel study beginning when they were in 7 through 9th grade and ending when they were in 10 through 12th grade (n = 3,412); half were male, 40.5 % were white, 49.9 % were black and 10.4 % were of another race/ethnicity. Significant between-subjects effects indicate that adolescents who typically have friends who use dating violence, and girls who are typically high in social status, are at increased risk for using dating violence throughout adolescence. Adolescents who typically have high quality friendships and girls who typically have friends with pro-social beliefs are at decreased risk for using dating violence throughout adolescence. Significant within-person contemporaneous effects indicate that both boys and girls reported lower levels of dating violence than usual at times when they had more friends with pro-social beliefs, and reported higher levels of dating violence than usual at times when they had higher social status. None of the lagged effects were significant and none of the effects varied across grade. These findings suggest that the peer context plays an important role in the development of the perpetration of adolescent dating violence.  相似文献   
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Why do some states choose to spend more than four times as much as others to provide health care to the disadvantaged? Political scientists who have traditionally explored this question by analyzing trends in overall Medicaid expenditures lumped states' discretionary spending in with other money that states are mandated to spend. Analyses of total expenditures found that socioeconomic factors drove spending but that party control of state legislatures made no difference in health policy making. By isolating discretionary state Medicaid expenditures from total spending figures, I reexamine the influences of political as well as economic and demographic factors. The often-doubted importance of party control becomes clear. This study investigates spending patterns in the discretionary portions of state Medicaid programs in forty-six states from 1980 to 1993 and analyzes both incremental program changes and absolute differences in state spending. To discover how greatly the researcher's choice of dependent variables can affect results, optional spending is separated from total spending levels and the variation is modeled in both. Focusing not on the spending that the federal government requires of state officials but on the policies that state officials actually choose allows a balanced exploration of both political and economic effects on welfare expenditures. This research also provides new insights about which forces will shape policy decisions if more and more control of the public health care system is devolved to the states.  相似文献   
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Beyle  Thad L. 《Publius》1988,18(3):131-152
Until recent decades, governors seeking to provide innovativeleadership often did so despite being handicapped by inadequateinstitutional powers, leaving them to their own personal skills.Recent reforms have now provided many governors with greaterinstitutional powers, including more tenure potential, enhancementof the governor's office, a stronger budget capacity, and therise of policy and planning offices located in or close to thegovernor's office. Most important, governors are more aggressivein seeking answers to policy issues both within their own statesand in collaboration with other governors. The National GovernorsAssociation has been upgraded to assist governors in dealingwith the federal government and with state problems. RecentNGA efforts in the areas of education and economic developmentmay presage an even more significant change as governors addressmajor issues jointly.  相似文献   
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Those who turn out in American primary elections are a small and unrepresentative subset of the population. Why do citizens forgo participation in nominating contests yet vote in general elections? We argue that limited contact lowers participation in primary elections. We present results from a randomized field experiment with near 150,000 letters in California’s 2014 primary. Each letter went to one of the four million Californians who had participated in recent general elections but not in primaries. We find that a single letter increased turnout by 0.5 points from a base rate of 9.3 percent. This increase is more than twice the average effect calculated in a recent meta-analysis and represents a proportional increase of 5.4 percent. Our experiment shows that registrants who typically abstain from primaries—and who are thus often ignored by campaigns—can be effectively mobilized.  相似文献   
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Review Essay     

Energy, Economics, and the Environment: Toward a Comprehensive Perspective, edited by Gregory A. Daneke. Lexington, Mass.: D.C. Heath, 1982.

Nuclear Power: Both Sides. The Best Arguments For and Against the Most Controversial Technology, edited by Michio Kaku and Jennifer Trainer. New York: W. W. Norton, 1982.  相似文献   
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