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   23675篇
  免费   337篇
  国内免费   15篇
管理学   3132篇
民族学   168篇
人才学   1篇
人口学   3485篇
丛书文集   144篇
理论方法论   1741篇
综合类   1006篇
社会学   11482篇
统计学   2868篇
  2023年   93篇
  2022年   69篇
  2021年   119篇
  2020年   232篇
  2019年   277篇
  2018年   1931篇
  2017年   2091篇
  2016年   1368篇
  2015年   310篇
  2014年   364篇
  2013年   2168篇
  2012年   806篇
  2011年   1578篇
  2010年   1397篇
  2009年   1085篇
  2008年   1215篇
  2007年   1390篇
  2006年   435篇
  2005年   589篇
  2004年   550篇
  2003年   462篇
  2002年   358篇
  2001年   352篇
  2000年   295篇
  1999年   281篇
  1998年   202篇
  1997年   170篇
  1996年   186篇
  1995年   174篇
  1994年   160篇
  1993年   166篇
  1992年   188篇
  1991年   187篇
  1990年   183篇
  1989年   164篇
  1988年   179篇
  1987年   191篇
  1986年   148篇
  1985年   157篇
  1984年   178篇
  1983年   155篇
  1982年   153篇
  1981年   121篇
  1980年   113篇
  1979年   123篇
  1978年   95篇
  1977年   80篇
  1976年   95篇
  1975年   110篇
  1974年   84篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
191.
192.
The author briefly reviews the impact of migration research on U.S. immigration policy over the period 1964-1992. Consideration is given to legal and illegal migrants and refugees.  相似文献   
193.
194.
Population growth,farmland, and the long-run standard of living   总被引:1,自引:0,他引:1  
This paper studies the natural-resources element in the theory of population growth over the very long run. In the context of the stock of land and Malthusian crises in earlier times, the model shows how resources have become more available rather than more scarce, even as population and income have increased.The paper sketches a mechanism which, added to the Malthusian system, leads to entirely different conclusions than does the Malthusian system. Using the illustration of food and land, change in knowledge and hence in the stock of resources is made a function of the stock of knowledge and the price of resources. The speed of adjustment depends on the economic and social climate for the development of new knowledge. Population growth first raises food and land prices, which then stimulate the creation of new resources, eventually leading to less scarcity of resources and lower prices than originally prevailed.That is, population growth creates new problems which in the short run constitute additional burdens which, in the longer run, lead to new developments that leave people better off than if the problems had never arisen.This paper benefitted from being presented in earlier draft at a Population Association of America meeting, to the Economic History workshop at the University of Illinois, and to a seminar of the International Union for the Scientific Study of Population in New Delhi. We appreciate valuable comments on earlier drafts from Stanley Engerman, E. L. Jones, William McNeill, and two anonymous referees. Gunter Steinmann acknowledges financial support from the Volkswagen Foundation and a travel grant from Fulbright Commission.  相似文献   
195.
196.
197.
This study explores differences in inter-household exchange of goods and services in Anglo- and Mexican-American families controlling for income level and for ethnicity. The extent of such exchange, its perceived importance to the family's quality of life, satisfaction with the exchange, and the relation of persons in the exchange process are examined. Significant differences are found more often between higher income Anglo- and Mexican-Americans than between low-income families, both in the family providing goods and services for others and in the receipt of them. Higher income Mexican-American families are more likely than their Anglo- counterparts to exchange with relatives. Ethnic effects are more prevalent in higher income households than in low-income households. Economic effects are more predominant than ethnic effects.This study contributes to interregional Agricultural Experiment Station Research Project NC-128, Quality of Life as Influenced by Area of Residence. Cooperating states: Arizona, California, Colorado, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, Nevada, Ohio, Texas.Flora L. Williams' current research interests include income adequacy, financial problems, and indicators of change in economic well-being. She is an Associate Professor, Consumer Sciences and Retailing, Purdue University, West Lafayette, IN 47907.  相似文献   
198.
Factors related to time spent in work roles are investigated for a sample of 685 wives living on family farms in seven southern and midwestern states. Data were collected in a comprehensive mail survey. Results show that variables reflecting management are the most important predictors of wife's time use satisfaction. Wife's satisfaction is also significantly related to her education and nonfarm employment. Conclusions indicate that, although wives on family farms experience work-role overload relative to their husbands, they are satisfied with their time contributions to the home/farm situation.Jeanne L. Hafstrom is Associate Professor, Consumer Sciences Division, University of Illinois, 161 Bevier Hall, 905 So. Goodwin, Urbana, IL 61801. She received her Ph.D. from the University of Illinois. Her current research interests include economic well-being and the quality of life.MaryAnn Paynter is Assistant Professor and Family Economics Extension Specialist, Consumer Sciences Division, University of Illinois, 547 Bevier Hall, 905 So. Goodwin, Urbana, IL 61801. She received her Ph.D. from Pennsylvania State University. Her current research interests include family resource management strategies.This study was part of S-191 Regional Research Project Farm Wife's External Employment, Family Economic Productivity and Family Functioning, and Project No. 60-0366 supported by the Agricultural Experiment Station, College of Agriculture, University of Illinois at Urbana-Champaign.  相似文献   
199.
Balancing act     
  相似文献   
200.
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