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   14420篇
  免费   320篇
  国内免费   13篇
财政金融   2544篇
工业经济   1133篇
计划管理   2397篇
经济学   3041篇
综合类   308篇
运输经济   100篇
旅游经济   302篇
贸易经济   2642篇
农业经济   771篇
经济概况   1491篇
邮电经济   24篇
  2021年   93篇
  2020年   160篇
  2019年   237篇
  2018年   303篇
  2017年   341篇
  2016年   325篇
  2015年   220篇
  2014年   344篇
  2013年   1397篇
  2012年   389篇
  2011年   412篇
  2010年   399篇
  2009年   431篇
  2008年   472篇
  2007年   443篇
  2006年   364篇
  2005年   361篇
  2004年   317篇
  2003年   317篇
  2002年   294篇
  2001年   293篇
  2000年   292篇
  1999年   263篇
  1998年   267篇
  1997年   267篇
  1996年   270篇
  1995年   243篇
  1994年   236篇
  1993年   259篇
  1992年   248篇
  1991年   231篇
  1990年   221篇
  1989年   192篇
  1988年   146篇
  1987年   182篇
  1986年   182篇
  1985年   266篇
  1984年   272篇
  1983年   269篇
  1982年   237篇
  1981年   239篇
  1980年   202篇
  1979年   212篇
  1978年   153篇
  1977年   159篇
  1976年   139篇
  1975年   110篇
  1974年   104篇
  1973年   97篇
  1972年   70篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
82.
Present patterns of productive activity are neither well recognized, optimal for society, nor in accordance with individual prefence. Although a great deal of attention has been given to meeting people's needs for income, medical care, and other services, the quality of their lives must also be defined by what they do for themselves and for others. In discovering present patterns of productive activity throughout the life course and optimizing those patterns, we will raise the quality of American life. To accomplish this task, two great changes are needed: we must recognize the full range of productive activities throughout the life course and give people the opportunity to modify the allocation of paid employment.  相似文献   
83.
84.
By consideration of either Generalised Least-Squares of Theil-Goldberger estimates of equations for which data on the dependent variable is available for a subset of the sample period on only an annual basis, it is shown that best estimates of the equation coefficients may be obtained by Ordinary Least-Squares estimation over the complete set of quarterly observations with quarterly averages substituted for the missing quarterly data, and symmetrically for the corresponding observations on the regressor variables. The approach is extended to the Two-Stage Least-Squares case, and to the (structurally or stochastically) autoregressive case.  相似文献   
85.
86.
87.
This study is concerned with one aspect of the family cycle, namely, the transition from young married to young married with small children. The focus is on developing models to forecast entries into this latter stage for the purpose of marketing research. "Using ordinary least squares, forecasting models were estimated for (1) total number of first births, (2) number of white first births, and (3) number of nonwhite first births." Models are estimated for both the United States and California using data from official sources.  相似文献   
88.
89.
The methodological ideal of experimentalists, E, is easily stated: derive a testable hypothesis, H, from a well-specified theory, T; implement experiments with a design; implicitly in the latter are auxiliary hypotheses, A, that surface in the review/discussion of completed research reports (payoffs are 'adequate,' Ss are 'relevant,' instructions, context are 'clear,' etc.). We want to be able to conclude, if statistical test outcomes support not-H, that T is 'falsified.' But this is not what we do; rather we ask if there is a flaw in the test, i.e. not-A is supported, and we do more experiments. This is good practice—much better than the statistical rhetoric of falsificationism. Undesigned social processes allow E to accumulate technical and instrumental knowledge that drive the reduction of experimental error and constitute a more coherent methodology than falsificationism.  相似文献   
90.
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