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   47904篇
  免费   1125篇
  国内免费   9篇
财政金融   7207篇
工业经济   2929篇
计划管理   6041篇
经济学   8691篇
综合类   784篇
运输经济   254篇
旅游经济   598篇
贸易经济   6573篇
农业经济   1810篇
经济概况   5091篇
水利工程   8972篇
信息产业经济   4篇
邮电经济   84篇
  2021年   329篇
  2020年   459篇
  2019年   661篇
  2018年   1576篇
  2017年   1517篇
  2016年   1301篇
  2015年   569篇
  2014年   930篇
  2013年   3927篇
  2012年   1565篇
  2011年   2064篇
  2010年   1629篇
  2009年   1678篇
  2008年   1706篇
  2007年   1964篇
  2006年   1217篇
  2005年   1161篇
  2004年   1232篇
  2003年   936篇
  2002年   922篇
  2001年   790篇
  2000年   788篇
  1999年   745篇
  1998年   697篇
  1997年   726篇
  1996年   713篇
  1995年   643篇
  1994年   649篇
  1993年   666篇
  1992年   719篇
  1991年   703篇
  1990年   600篇
  1989年   556篇
  1988年   528篇
  1987年   564篇
  1986年   550篇
  1985年   784篇
  1984年   772篇
  1983年   734篇
  1982年   664篇
  1981年   638篇
  1980年   691篇
  1979年   631篇
  1978年   508篇
  1977年   475篇
  1976年   422篇
  1975年   450篇
  1974年   380篇
  1973年   385篇
  1972年   280篇
排序方式: 共有10000条查询结果,搜索用时 16 毫秒
991.
992.
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   
993.
The paper reports the main results of using British cross-section data to estimate a labour supply function in which preference variables are interacted with terms measuring the slope and position of the budget constraint.  相似文献   
994.
An attempt is made to forecast migration trends affecting those countries that were formerly part of the Soviet Union. "The new migratory trends are characterized by at least three fundamentally important elements: the ouster of the newly arrived population from the social niche that it had recently occupied, emigration from overpopulated regions, and growing emigration beyond the borders of the former Union."  相似文献   
995.
The theoretical and empirical assumptions implied by conventional import equations are identified and tested for the US and UK. The demand for imports is found to respond much more strongly to changes in domestic rather than foreign prices. The elasticity with respect to income estimated by traditional functions is shown to be upward biased. Finally, a direct link between the money supply and imports is established, with consequences for all import elasticities.  相似文献   
996.
997.
998.
999.
The lagging development of many minority communities has had an adverse effect on economic growth in the United States. One factor historically associated with creating or exacerbating this minority problem is the unwillingness of banks to service minority communities adequately. The federal government used two initiatives to address banks' reluctance to aid minorities: the Community Reinvestment Act (CRA) that ended the practice of redlining and required all federally regulated banks to demonstrate that they served the convenience and credit needs of their local communities, particularly minorities, women, and other underserved groups, and the establishment and preservation of minority owned banks that were expected to be more sympathetic to the needs of their communities. This paper evaluates the extent to which minority banks have met the needs of minority communities. The assessment is conducted in the context of the ratings received by minority banks on their Community Reinvestment Act (CRA) audits. Through the use of CRA audits, the performance of minority banks is also compared to the performance of the general banking community to determine the validity and success of the government's minority banking initiative. Analysis of CRA audit ratings also compares the performance of minority banks among different ethnicities.  相似文献   
1000.
Abstract. Economic theories of managing renewable resources, such as fisheries and forestry, traditionally assume that individual harvesters are perfectly rational and thus able to compute the harvesting strategy that maximizes their discounted profits. The current paper presents an alternative approach based on bounded rationality and evolutionary mechanisms. It is assumed that individual harvesters face a choice between two harvesting strategies. The evolution of the distribution of strategies in the population is modeled through a replicator dynamics equation. The latter captures the idea that strategies yielding above average profits are demanded more than strategies yielding below average profits, so that the first type ends up accounting for a larger part in the population. From a mathematical perspective, the combination of resource and evolutionary processes leads to complex dynamics. The paper presents the existence and stability conditions for each steady-state of the system and analyzes dynamic paths to the equilibrium. In addition, effects of changes in prices are analyzed. A main result of the paper is that under certain conditions both strategies can survive in the long-run. Correspondence to: J. Noailly  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