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   142311篇
  免费   3842篇
  国内免费   1篇
财政金融   26750篇
工业经济   11888篇
计划管理   22963篇
经济学   30889篇
综合类   1507篇
运输经济   1019篇
旅游经济   2563篇
贸易经济   24452篇
农业经济   6304篇
经济概况   17504篇
信息产业经济   7篇
邮电经济   308篇
  2021年   864篇
  2020年   1673篇
  2019年   2447篇
  2018年   2495篇
  2017年   2646篇
  2016年   2821篇
  2015年   2172篇
  2014年   3493篇
  2013年   15752篇
  2012年   4377篇
  2011年   4393篇
  2010年   3918篇
  2009年   4527篇
  2008年   4124篇
  2007年   3484篇
  2006年   3747篇
  2005年   3718篇
  2004年   3320篇
  2003年   3092篇
  2002年   3026篇
  2001年   2811篇
  2000年   2728篇
  1999年   2584篇
  1998年   2463篇
  1997年   2467篇
  1996年   2343篇
  1995年   2131篇
  1994年   2157篇
  1993年   2134篇
  1992年   2164篇
  1991年   2067篇
  1990年   1931篇
  1989年   1754篇
  1988年   1692篇
  1987年   1692篇
  1986年   1774篇
  1985年   2555篇
  1984年   2448篇
  1983年   2237篇
  1982年   2092篇
  1981年   2002篇
  1980年   1981篇
  1979年   1906篇
  1978年   1706篇
  1977年   1654篇
  1976年   1405篇
  1975年   1316篇
  1974年   1208篇
  1973年   1210篇
  1972年   910篇
排序方式: 共有10000条查询结果,搜索用时 12 毫秒
101.
This paper explores differences in the bidding patterns of entrants and incumbents in road construction auctions. We find that entrants bid more aggressively and win auctions with significantly lower bids than incumbents. The differences in their bidding patterns are consistent with a model of auctions in which the distribution of an entrant's costs exhibits greater dispersion than that of an incumbent's and relations of stochastic dominance in the distributions do not persist for the entire range of estimated costs. We also find that more efficient firms bid, on average, more aggressively and firms with greater backlogs bid less aggressively.  相似文献   
102.
One Pleistocene mystery is why early North Americans eradicated their large, potentially domesticable animals (e.g., horses), whereas early Europeans did not. A commonly‐held hypothesis is that European species were evasive due to co‐evolution with hominids, whereas North American animals were naïve and unable to adapt quickly enough when experienced human hunters arrived from Eurasia. We explore this hypothesis with a paleoeconomic model of co‐evolution that integrates human hunting investments and wildlife population responses. We find that investments in hunting ability, based on the relative scarcity of prey species, could have mattered more than wildlife ‘naivety’ in explaining the extinction.  相似文献   
103.
104.
Despite the prevalence of elective business ethics courses, little research has sought to explain and predict why some students enroll in these courses and while others do not. Using the theory of planned behavior (Ajzen and Madden, 1986) as a theoretical foundation, 178 graduate students in Ireland were surveyed about their intention to sign up for an elective ethics class. Their behavior was measured two months later. The results reveal the power of the theory of planned behavior to explain and predict who takes elective ethics classes.Donna M. Randall is an associate professor and chair in the Department of Management and Systems at Washington State University. Her research interests include business ethics, organizational commitment, and reproductive risk in the work place. Her work has appeared inJournal of Business Ethics, Decision Sciences, Academy of Management Review, Journal of Vocational Behavior, Journal of Business Research, and others.  相似文献   
105.
106.
In this paper we will analyze the relationship between the value and duration moments of a cash flow and movements in the yield curve. We will show that for changes in the yield curve which can be related to tn , the 1st order changes in the net present value of a cash flow are linearly dependent on the n + lth duration moments, and that the 2nd order changes are dependent on the sum of duration moments of order 2 n + 1 and 2 n + 2. We will use this relationship to tilt tracking portfolios so as to protect them against specific changes in the yield curve.  相似文献   
107.
Objections to the teaching of business ethics   总被引:1,自引:0,他引:1  
  相似文献   
108.
109.
110.
Abstract The research question in the present article can be phrased in the following way: what are the elements which influence the perception of the utility of information received from another function? A field study research has been conducted in 40 Belgian companies. In each company, we have studied two on-going innovation projects (one planning project, one development project). Crossfunctional communication behaviours at the R&D/marketing interface have been measured by means of mailed structured questionnaires. Three-hundred and eighty-six questionnaires have been returned. The data analyses show that there are four underlying information dimensions, i.e. the perceived relevance, the perceived comprehensibility, the perceived novelty and the perceived credibility of information. We also discuss some contingency variables (function of the message receiver, stage in the innovation process) that might moderate the impact of these dimensions. It will be shown that the interaction between source and receiver has a significant impact on the perceived credibility, the perceived comprehensibility and the perceived novelty of the received information.  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