首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   17720篇
  免费   323篇
各国政治   862篇
工人农民   1390篇
世界政治   936篇
外交国际关系   692篇
法律   10070篇
中国共产党   2篇
中国政治   145篇
政治理论   3849篇
综合类   97篇
  2020年   123篇
  2019年   147篇
  2018年   1427篇
  2017年   1408篇
  2016年   1213篇
  2015年   264篇
  2014年   220篇
  2013年   1226篇
  2012年   433篇
  2011年   1221篇
  2010年   1214篇
  2009年   827篇
  2008年   979篇
  2007年   909篇
  2006年   250篇
  2005年   271篇
  2004年   404篇
  2003年   400篇
  2002年   210篇
  2001年   369篇
  2000年   342篇
  1999年   302篇
  1998年   166篇
  1997年   132篇
  1996年   138篇
  1995年   142篇
  1994年   141篇
  1993年   117篇
  1992年   171篇
  1991年   174篇
  1990年   154篇
  1989年   151篇
  1988年   169篇
  1987年   166篇
  1986年   179篇
  1985年   159篇
  1984年   172篇
  1983年   169篇
  1982年   108篇
  1981年   81篇
  1980年   95篇
  1979年   111篇
  1978年   91篇
  1977年   78篇
  1976年   78篇
  1975年   66篇
  1974年   55篇
  1973年   57篇
  1971年   56篇
  1969年   54篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
This study compared AIDS knowledge and attitudes in public high school students (N=167), incarcerated delinquents (N=166), and emotionally disturbed (SED) adolescents (N=151). The response measure was a 50-item Acquired Immunodeficiency Syndrome (AIDS) questionnaire that was previously used by Bell et al., in their 1991 study of learning disabled adolescents. Although AIDS knowledge was moderately high in all three groups, widespread misunderstandings about disease transmission and awareness of high-risk groups and practices were noted. Knowledge scores were significantly higher in the public school sample than in the SED adolescents; moreover, they tended to be slightly higher (p<0.10) than the delinquent group as well. Teenagers with the severest emotional problems were by far the least informed. Age and race were also predictive of AIDS knowledge. Other results showed that delinquents were more permissive in their attitudes about sex, more inclined to disdain safe sex practices, and more likely to feel threatened by high-risk groups as well as powerless to protect themselves against AIDS. Generally speaking, the findings extend the work of other investigators on the needs for AIDS education in adolescents. The need is especially urgent in delinquent and emotionally disturbed youth who may require a more comprehensive intervention because of their greater knowledge deficits, propensity for high-risk practices, and tendency to deny or underestimate their own vulnerability.Received Ph.D. in clinical psychology from the University of Utah in Salt Lake City. Research interests include health behavior change and the treatment of anxiety and habit disorders. To whom correspondence should be addressed.Received M.A. degree in psychology from the University of the Pacific. Research interests include health behavior change and medical epidemiology.Received Ph.D. in psychology from the University of Auckland, Auckland, New Zealand. Research interests are in child and adolescent psychiatry and the delivery of mental health services.Received Ph.D. in biostatistics from the Medical College of Virginia. Research interests are in general linear models.  相似文献   
982.
Abstract: This article discusses the findings of a detailed study of the practice of contracting out local government services in municipalities and regional districts in British Columbia. No similar study has been conducted in Canada to date, and comparable research in the United States has only examined the contracting of selected local government services. The findings are important for local government managers and elected officials because they indicate widespread reliance on contractors. Of all 124 local governments participating in the study, contractors were involved in the production of 32 per cent of all services. Of these, engineering services were the most likely to be produced by contractors (40.4 per cent). Specific comparisons of the B.C. findings with those in U.S. studies suggested that contracting for services was actually more widespread in B.C. than in the U.S. Further, reliance on contracting in B.C. had apparently increased over time. In 1980, 25 per cent of municipalities with a population over 10,000 contracted out the collection of residential solid waste. By 1989, that figure had increased to 54.8 per cent. Local government managers themselves saw no future reduction of the reliance on contracting; in fact, 22.8 per cent predicted an increase over the next five years. Sommaire: Cet article examine les constatations d'une étude détaillée sur la pratique des contrats de services parmi les municipalités et les districts régionaux de la Colombie-Britannique. Une telle étude n'a encore jamais été effectuée au Canada, et des recherches comparables aux États-Unis n'ont examiné que les contrats relatifs à certains services des gouvernements locaux. Les constatations sont importantes pour les gestionnaires et les élus des gouvernements locaux parce qu'elles révèlent le rôle très important des entreprises dans la prestation de services. Si l'on considère l'ensemble des 124 gouvernements locaux ayant participéà l'étude, les entrepreneurs sont impliqués dans la production de 32 pour cent de tous les services. Parmi les services fournis, ce sont les services d'ingénierie dont la plus forte proportion était assurée par des entrepreneurs (40,4 pour cent). Les coniparaisons spécifiques des ronstatations faitcs en Colornbie-Britannique à celles des études américaines suggerent que la Colornbie-Britannique fait davantage appel aux services sous-traités clue les États-Unis. Par ailleurs, la sous-traitance en Colombie-Britannique s'est apparernment accrue au fil des années. En 1980, 25 pour cent des municipaliteAs ayant une population de plus de 10 000 personnes avaient sous-traité le rarnassage des déchets solides résidentiels. En 1989, ce chiffre cyt passéà 51.8 pour cent. Les gestion-naires des gouvernements locaux eux-mêmes ne prévoient aucune réduction de la sous-traitance; en fait, 22,8 pour cent prévoient une augmentation au cours des cinq prochailies années.  相似文献   
983.
The recent report produced by Vice President Gore's committee on government efficiency highlights the importance of streamlining government operations. But often there are trade-offs between administrative streamlining and accomplishing substantive program objectives. This article examines these tradeoffs in the context of the Food Stamp Program, an important component of the United States' safety net for providing low-income assistance. We estimate impacts on both administrative costs and substantive outcomes (participant food expenditures) resulting from issuing program benefits in the form of checks rather than the usual food coupons. The findings, which are based on experimental tests of the cashout approach in parts of Alabama and California, suggest that significant cost savings can be attained through cashout but that these savings may be achieved at the cost of weakening the program's ability to achieve its substantive objective of encouraging food use.  相似文献   
984.
The Targeted Jobs Tax Credit (TJTC) is a representative redistributive incentive. Initially, proponents saw TJTC as an elegant program, efficiently promoting labor market behavior that would solve the employment problems of many disadvantaged job seekers. However, interest groups distorted the credit into a windfall for businesses that hire large numbers of low wage workers. The policy theories incorporated into TJTC, which emphasized continual program reform and minimized program management by public administrators, provided a setting conducive to interest group distortion. Because few representatives of the disadvantaged participated in the oversight process, special interests undermined TJTC being reformed through empirical evaluation. This experience indicates that without major changes in the policy process, narrowly targeted rzdistributive policies should be avoided.  相似文献   
985.
986.
Townies     
Erick C. Hanson 《Society》1995,32(4):74-79
His work has been featured in numerous publications.  相似文献   
987.
The literature on incumbency advantage has focused on margin as an indicator for electoral security. But while electoral margin is a goodex ante measure, it is a poorex post measure of security. Further, existing work has not integrated the choice of retirement with changes in the level of security. To improve the specification and definition of “marginality”, a multinomial LOGIT model is proposed where the dependent variable is categorical. Account is therefore taken of all the ways a Representative's term in office can end, including reelection, defeat, retirement, or pursuit of other office. The sample includes all U.S. Representatives elected for the first time between 1948 and 1978. The results indicate that (1) margin in the previous election is a significantex ante proxy for the probability of electoral defeat, and (2) while the electoral safety of all incumbents in the House has been increased, the increases are greater for members elected for the first time in the period since 1965.  相似文献   
988.
989.
990.
Secrecy in the voting process eliminated an important motivation for voting. No longer able to verify the voters' choices, political parties stopped offering payments in return for votes. Within the rational voter framework, it will be shown that these payments were a prime impetus for people to vote. Without a vote market to cover their voting costs, many voters were rational to stay away from the polls. This hypothesis is supported through a series of empirical tests culminating in a multivariate legislative regression. When other electoral laws are controlled for, the secret ballot accounts for 7 percentage points lower Gubernatorial turnout.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号