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   17323篇
  免费   498篇
  国内免费   15篇
管理学   2220篇
民族学   111篇
人才学   3篇
人口学   1512篇
丛书文集   169篇
理论方法论   1666篇
综合类   730篇
社会学   9182篇
统计学   2243篇
  2023年   94篇
  2022年   74篇
  2021年   137篇
  2020年   262篇
  2019年   336篇
  2018年   418篇
  2017年   606篇
  2016年   448篇
  2015年   344篇
  2014年   405篇
  2013年   2763篇
  2012年   626篇
  2011年   618篇
  2010年   515篇
  2009年   438篇
  2008年   521篇
  2007年   577篇
  2006年   537篇
  2005年   489篇
  2004年   399篇
  2003年   367篇
  2002年   371篇
  2001年   432篇
  2000年   360篇
  1999年   355篇
  1998年   277篇
  1997年   236篇
  1996年   228篇
  1995年   236篇
  1994年   223篇
  1993年   218篇
  1992年   255篇
  1991年   245篇
  1990年   237篇
  1989年   204篇
  1988年   207篇
  1987年   227篇
  1986年   189篇
  1985年   199篇
  1984年   208篇
  1983年   202篇
  1982年   195篇
  1981年   157篇
  1980年   149篇
  1979年   164篇
  1978年   136篇
  1977年   95篇
  1976年   118篇
  1975年   132篇
  1974年   114篇
排序方式: 共有10000条查询结果,搜索用时 520 毫秒
221.
222.
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   
223.
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   
224.
225.
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   
226.
227.
Balancing act     
  相似文献   
228.
The authors describe the socioeconomic characteristics and fertility patterns of female immigrants from Latin America to the United States, with a focus on reasons for fertility differentials. "Using the one per cent public use sample from the 1970 and 1980 United States census, we first compare changes in socio economic characteristics from 1970 to 1980, and then examine the determinants of fertility of female immigrants to the United States, aged 16-49, from four Latin American areas or countries of birth.... The findings...suggest that there are direct effects of demographic, assimilation, and socioeconomic variables beyond those mediated by the variables in each of these sets. Further, regardless of the model, the effect of the clusters of demographic characteristics is most apparent. Age categories and marital status are the strongest indexed determinants of immigrant fertility.... The effect of education and employment is strong. Among assimilation variables, duration of residence and language ability are significant determinants of Hispanic immigrant fertility." (SUMMARY IN FRE AND SPA)  相似文献   
229.
230.
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