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   24469篇
  免费   500篇
  国内免费   1篇
财政金融   4422篇
工业经济   1905篇
计划管理   4078篇
经济学   5277篇
综合类   270篇
运输经济   167篇
旅游经济   350篇
贸易经济   3971篇
农业经济   1303篇
经济概况   3179篇
信息产业经济   1篇
邮电经济   47篇
  2020年   244篇
  2019年   345篇
  2018年   466篇
  2017年   460篇
  2016年   461篇
  2015年   309篇
  2014年   491篇
  2013年   2238篇
  2012年   699篇
  2011年   734篇
  2010年   625篇
  2009年   728篇
  2008年   647篇
  2007年   656篇
  2006年   581篇
  2005年   481篇
  2004年   494篇
  2003年   475篇
  2002年   511篇
  2001年   449篇
  2000年   508篇
  1999年   436篇
  1998年   427篇
  1997年   409篇
  1996年   415篇
  1995年   368篇
  1994年   392篇
  1993年   382篇
  1992年   439篇
  1991年   418篇
  1990年   382篇
  1989年   327篇
  1988年   287篇
  1987年   333篇
  1986年   345篇
  1985年   490篇
  1984年   494篇
  1983年   437篇
  1982年   413篇
  1981年   416篇
  1980年   397篇
  1979年   411篇
  1978年   302篇
  1977年   282篇
  1976年   244篇
  1975年   268篇
  1974年   203篇
  1973年   205篇
  1972年   173篇
  1971年   152篇
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
91.
The separation of manpower forecasting into a demand forecast and a supply forecast emphasizes that each depends on quite different sources of information. The demand forecast is based primarily on an estimate of sales, which is then transformed into the number and type of personnel needed to produce and sell the company's products. The information for forecasting internal supply can often be treated as if it were independent of the external environment and is often available within the firm. If a matrix representing the probability of transition from one job classification to another can be prepared for the relevant classifications, Markov-chain theory can be used to generate a forecast of internal manpower supply.  相似文献   
92.
In summary, substance abuse is a serious problem in America. In fact, a Gallup poll ranked drug use as the Nation's number one problem. As a rapidly accelerating component of health care costs, charges for alcohol and drug abuse treatment are helping to drive up medical care expenses. The substance abuse crisis is also affecting employers, both public and private, who are struggling to provide needed health benefits while controlling spiraling plan costs. Despite the upward pressure on health costs, the problem is so serious that there has been a steady increase in the incidence of coverage for substance abuse treatment in employer-provided medical care plans, to the point that virtually all plans now provide some benefits. Nevertheless, health plans typically cover substance abuse treatment on a more restrictive basis than other illnesses. This may change, however, as the interest in, and the need for, comprehensive substance abuse treatment benefits grows.  相似文献   
93.
94.
95.
96.
97.
98.
Characteristics of communal club members who use input packages are studied using a survey of communal clubs serviced by Africa Co‐operative Action Trust (Acat) in KwaZulu during 1989. Discriminant analysis shows that full input package adopters tend to belong to older clubs, have less formal savings and receive more visits each year from KwaZulu Department of Agriculture (KDA) extension officers. They also have a greater proportion of land under sugar‐cane, larger farm sizes and a higher rand monetary value of livestock.

Members of older clubs benefit from greater club experience in ordering inputs and liquidity for securing discounts on bulk orders. Clubs also enable scarce KDA extension manpower resources to be used more effectively by focusing extension efforts on groups rather than individual farmers. Sugar‐cane production probably indicates member willingness to innovate and the availability of funds to buy complete input packages for other crops. Increased access to land promotes input package adoption which can raise agricultural productivity. Development of institutional arrangements for a land rental market in KwaZulu should be considered. Higher monetary values of livestock reflect Increased ability to bear risk associated with technology adoption and that adopters have the means to purchase input packages  相似文献   

99.
100.
Upgrading management opportunities for women   总被引:1,自引:0,他引:1  
  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