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   88651篇
  免费   2938篇
  国内免费   3篇
管理学   12200篇
民族学   534篇
人才学   25篇
人口学   6799篇
丛书文集   508篇
理论方法论   9317篇
综合类   2076篇
社会学   41418篇
统计学   18715篇
  2023年   504篇
  2021年   567篇
  2020年   1500篇
  2019年   2192篇
  2018年   2044篇
  2017年   3103篇
  2016年   2351篇
  2015年   2037篇
  2014年   2622篇
  2013年   18789篇
  2012年   2299篇
  2011年   2073篇
  2010年   1910篇
  2009年   2155篇
  2008年   1989篇
  2007年   1785篇
  2006年   2030篇
  2005年   2210篇
  2004年   2108篇
  2003年   1867篇
  2002年   1958篇
  2001年   1957篇
  2000年   1739篇
  1999年   1645篇
  1998年   1491篇
  1997年   1327篇
  1996年   1293篇
  1995年   1311篇
  1994年   1272篇
  1993年   1257篇
  1992年   1244篇
  1991年   1178篇
  1990年   1152篇
  1989年   992篇
  1988年   1098篇
  1987年   981篇
  1986年   876篇
  1985年   1049篇
  1984年   1100篇
  1983年   990篇
  1982年   914篇
  1981年   839篇
  1980年   802篇
  1979年   853篇
  1978年   761篇
  1977年   687篇
  1976年   642篇
  1975年   618篇
  1974年   511篇
  1973年   427篇
排序方式: 共有10000条查询结果,搜索用时 562 毫秒
501.
This study investigated the gender-specific, self-reported sexual behaviors and attitudes of never-married college students attending a southeastern university in 1973 and 1988. Data were collected by means of a mailed questionnaire that remained essentially unchanged for both years. The authors found that both men and women reported an increase in heterosexual relationships that included sexual intercourse and a decrease in nonsexual relationships with the other gender. The majority of the students perceived themselves as adequately informed about sexuality and satisfied with their relationships, although the proportion of men who reported being satisfied with their relationships declined over the 15 years. The students indicated that sexuality education should focus primarily on information about AIDS and on preparation for marriage.  相似文献   
502.
503.
THE INFLUENCE OF ECONOMICS ON ANTITRUST LAW   总被引:1,自引:0,他引:1  
Economists today play prominent roles in formulating antitrust policy and litigating antitrust cases. This paper explains why economics influences antitrust law and describes how economic theories enter and shape the antitrust system. Antitrust policy and doctrine change over time in response to developments in economic theory, and the decentralization of the antitrust adjudication system and the wide latitude accorded judges in interpreting antitrust statutes ensure that legal rules will reflect advances in the economic literature concerning the appropriate content of standards governing business conduct.  相似文献   
504.
Using a simple theoretical model and giving an empirical example it is investigated if it matters whether we use (monthly) averages or end-of-period (month) data in performing Granger-causality tests. It is shown that no major problems are to be expected if the two series are temporally aggregated in the same way, but non-trivial problems can occur if the two series have different kinds of temporal aggregation.  相似文献   
505.
Bivariate probit estimates with partial observability identify the factors influencing the worker’s decision to seek a state or local government job and the factors influencing the government’s decision to hire particular workers. The estimates routinely confirm the presence of a local job queue but confirm the presence of a state job queue only when the role of unionization is explicitly recognized. Our results suggest that the net benefits from local and state government employment are greater than those from private sector employment. The estimates also indicate that local governments disproportionately hire racial minorities relative to the local governments’ pool of applicants but indicate no such relationship for state governments. The authors thank Dale Belman, Jugal Ghorai, and Matt Higgins for help on this and related work. We also thank the referee and the editor for useful suggestions.  相似文献   
506.
A large number of states adopted tort reforms in the mid-1980s to limit the dramatic surge in insurance losses and premiums. Evidence based on liability insurance data by state indicates that these reforms substantially influenced general liability insurance. The levels of losses, premiums, and loss ratios (a measure of insurance profitability) all reflected the impact of the reforms. The large-scale reform efforts in 1986 were particularly influential. Medical malpractice insurance was much less sensitive to the reform efforts.  相似文献   
507.
508.
509.
510.
Philadelphia, then and still one of the worst governed of America’s badly governed cities, was having one of its periodic spasms of reform. A thorough study of causes was called for. Not but what the underlining cause was evident to most white Philadelphians: the corrupt semi-criminal vote of the Negro Seventh Ward…. Would it not be well, to elucidate the known causes by a scientific investigation?… With my bride of three months, I settled in one room over a cafeteria run by a College Settlement, in the worst part of the Seventh Ward. We lived there a year, in the midst of an atmosphere of dirt, drunkenness, poverty and crime. Murder sat on our doorstep, police were our government, and philanthropy dropped in with periodic advice. (DuBois, 1968/1975: 194–5 also in Logan, ed. 1944: 42) What had been borne into me during my book studies was my utter ignorance of the manual-working class, that is, of four-fifths of my countrymen…. How was I to get an opportunity of watching, day by day, in their homes and in their workshops, a sufficient number of normal manual-working families to enable me to visualize the class as a whole; to understand what was meant by chronic poverty and insecurity of livelihood. (Webb, 1926: 146–7)  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