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   14749篇
  免费   337篇
财政金融   3089篇
工业经济   1106篇
计划管理   2371篇
经济学   3128篇
综合类   160篇
运输经济   113篇
旅游经济   255篇
贸易经济   2398篇
农业经济   642篇
经济概况   1808篇
信息产业经济   2篇
邮电经济   14篇
  2023年   77篇
  2021年   94篇
  2020年   205篇
  2019年   266篇
  2018年   352篇
  2017年   354篇
  2016年   332篇
  2015年   219篇
  2014年   350篇
  2013年   1678篇
  2012年   403篇
  2011年   496篇
  2010年   450篇
  2009年   466篇
  2008年   430篇
  2007年   374篇
  2006年   353篇
  2005年   282篇
  2004年   283篇
  2003年   291篇
  2002年   290篇
  2001年   288篇
  2000年   305篇
  1999年   307篇
  1998年   308篇
  1997年   272篇
  1996年   231篇
  1995年   229篇
  1994年   249篇
  1993年   248篇
  1992年   270篇
  1991年   255篇
  1990年   206篇
  1989年   187篇
  1988年   167篇
  1987年   163篇
  1986年   171篇
  1985年   240篇
  1984年   254篇
  1983年   245篇
  1982年   215篇
  1981年   199篇
  1980年   169篇
  1979年   169篇
  1978年   158篇
  1977年   135篇
  1976年   125篇
  1975年   142篇
  1974年   100篇
  1973年   100篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
51.
"The decreasing fertility rates in Sweden during the 1970s can be explained as postponement of childbearing. An increasingly larger part of each generation has chosen to bear children at a late age, after education and some years of occupational work. As a consequence, the yearly age-specific rates will, in years to come, change systematically towards relatively high rates for women in the second half of the fertile period; changes which are important in population projections. To predict the future rates a model based on birth order data and assumptions about the final family size is used. The model and its application in the 1989 projection of the Swedish population is discussed in the paper. Alternative projections and the assumptions behind the alternatives are specified."  相似文献   
52.
53.
Collaborating researchers used a multi equation model to analyze 3080 mother-infant pairs living on the island of Cebu in the central Philippines and to estimate a child health production function. The econometric methods used eliminated obstacles such as heterogeneity and endogeneity of significant explanatory factors. They also maximized the longitudinal quality of the data. The results showed that morbidity in 1 period reduced infant weight in following periods. For example, diarrhea and febrile respiratory infection reduced growth in the time period following the illnesses. Further effects of some contributing factors were great near birth not diminished with age. For example, breast feeding promoted growth and protected against infection, especially diarrhea and febrile respiratory infection, more substantially near birth than it did later. Further, in urban areas, preventive health care positively affected growth independently of its indirect influence on reducing respiratory infection. Yet it had little effect on diarrhea. Diarrhea had a strong adverse effect on growth. Exposure of the infant to enteric pathogens had the greatest influence on production of diarrhea. In urban areas, exposure included water supply contamination, exposure to feces, a more pathogenic diet, and community crowding. In rural areas, however, exposure included community crowding and increased rainfall which presumably washed feces into the water supply. Household crowding in both urban and rural areas and irritation from smoke in urban areas only tended to bring about febrile respiratory infection.  相似文献   
54.
55.
Retiree medical benefits are an ever-growing concern as costs escalate and the date for implementation of Statement of Financial Accounting Standards No. 106 approaches. These authors summarize case law relevant to employers' right to modify or terminate benefits and discuss methods of funding theses liabilities.  相似文献   
56.
57.
58.
59.
60.
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