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   8173篇
  免费   126篇
  国内免费   1篇
管理学   1104篇
民族学   29篇
人口学   711篇
丛书文集   31篇
理论方法论   696篇
综合类   134篇
社会学   3672篇
统计学   1923篇
  2020年   115篇
  2019年   172篇
  2018年   167篇
  2017年   258篇
  2016年   175篇
  2015年   155篇
  2014年   181篇
  2013年   1515篇
  2012年   245篇
  2011年   201篇
  2010年   186篇
  2009年   159篇
  2008年   225篇
  2007年   223篇
  2006年   183篇
  2005年   158篇
  2004年   137篇
  2003年   128篇
  2002年   144篇
  2001年   184篇
  2000年   163篇
  1999年   147篇
  1998年   128篇
  1997年   128篇
  1996年   125篇
  1995年   110篇
  1994年   83篇
  1993年   126篇
  1992年   137篇
  1991年   119篇
  1990年   130篇
  1989年   108篇
  1988年   106篇
  1987年   111篇
  1986年   99篇
  1985年   84篇
  1984年   115篇
  1983年   98篇
  1982年   94篇
  1981年   63篇
  1980年   93篇
  1979年   105篇
  1978年   72篇
  1977年   82篇
  1976年   70篇
  1975年   85篇
  1974年   68篇
  1973年   54篇
  1972年   61篇
  1971年   52篇
排序方式: 共有8300条查询结果,搜索用时 15 毫秒
1.
2.
3.
The authors present three educational approaches designed to demystify the writing process and to support better writing skills among family therapists. One framework is an academic course in professional writing, another is a writing seminar for family therapy and physician trainees within a medical school setting, and the third is a 2-hour continuing education writing workshop for family therapists. Each is replicable within a variety of settings.  相似文献   
4.
Many recent papers have used semiparametric methods, especially the log-periodogram regression, to detect and estimate long memory in the volatility of asset returns. In these papers, the volatility is proxied by measures such as squared, log-squared, and absolute returns. While the evidence for the existence of long memory is strong using any of these measures, the actual long memory parameter estimates can be sensitive to which measure is used. In Monte-Carlo simulations, I find that if the data is conditionally leptokurtic, the log-periodogram regression estimator using squared returns has a large downward bias, which is avoided by using other volatility measures. In United States stock return data, I find that squared returns give much lower estimates of the long memory parameter than the alternative volatility measures, which is consistent with the simulation results. I conclude that researchers should avoid using the squared returns in the semiparametric estimation of long memory volatility dependencies.  相似文献   
5.
Time, Self, and the Curiously Abstract Concept of Agency*   总被引:2,自引:0,他引:2  
The term "agency" is quite slippery and is used differently depending on the epistemological roots and goals of scholars who employ it. Distressingly, the sociological literature on the concept rarely addresses relevant social psychological research. We take a social behaviorist approach to agency by suggesting that individual temporal orientations are underutilized in conceptualizing this core sociological concept. Different temporal foci—the actor's engaged response to situational circumstances—implicate different forms of agency. This article offers a theoretical model involving four analytical types of agency ("existential,""identity,""pragmatic," and "life course") that are often conflated across treatments of the topic. Each mode of agency overlaps with established social psychological literatures, most notably about the self, enabling scholars to anchor overly abstract treatments of agency within established research literatures.  相似文献   
6.
7.
8.
9.
One hundred and sixty-four elite union leaders in the United States completed a survey to assess the condition of the American labor movement and the factors affecting it. The respondents included high-level international union and state federation officers, central labor presidents, and 58 shop stewards. This study compares the responses of these labor officials and finds that they have similar, negative assessments of the condition of the American labor movement. The study also finds that these leaders agree that the most important factors affecting the labor movement are collective bargaining rights, union leadership, union member solidarity, and the NLRB.  相似文献   
10.
Conclusion Data systems created with one purpose inevitably have shortcomings when used for other purposes, so it is not surprising that a database compiled from informational tax returns has serious flaws when used to compile a statistical picture of the non-profit sector. The two-digit NTEE level of aggregation that is published in theAlmanac conceals many problems that appear when the IRS-based data are broken down to the three-digit level.Identification of the problems in the NTEE and in the use of the IRS data is a necessary step toward their correction. At this point, it is clear that the IRS-based numbers in theAlmanac should be regarded, at best, as rough approximations and as a starting point for additional work. My assessment of theAlmanac suggests that, at least as far as health care is concerned, the NTEE needs revision. Correcting the problems with the IRS data will be much, much more difficult.I am grateful for assistance from Steve Noga, Chris Toppe and Virginia Hodgkinson at Independent Sector.  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