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   10262篇
  免费   281篇
财政金融   1988篇
工业经济   968篇
计划管理   1696篇
经济学   2336篇
综合类   130篇
运输经济   80篇
旅游经济   200篇
贸易经济   1792篇
农业经济   542篇
经济概况   807篇
信息产业经济   2篇
邮电经济   2篇
  2023年   53篇
  2021年   48篇
  2020年   121篇
  2019年   155篇
  2018年   167篇
  2017年   201篇
  2016年   205篇
  2015年   137篇
  2014年   207篇
  2013年   1335篇
  2012年   268篇
  2011年   383篇
  2010年   262篇
  2009年   326篇
  2008年   308篇
  2007年   319篇
  2006年   321篇
  2005年   297篇
  2004年   270篇
  2003年   298篇
  2002年   293篇
  2001年   257篇
  2000年   221篇
  1999年   223篇
  1998年   231篇
  1997年   222篇
  1996年   197篇
  1995年   163篇
  1994年   153篇
  1993年   171篇
  1992年   151篇
  1991年   151篇
  1990年   126篇
  1989年   113篇
  1988年   110篇
  1987年   94篇
  1986年   115篇
  1985年   175篇
  1984年   191篇
  1983年   147篇
  1982年   151篇
  1981年   146篇
  1980年   155篇
  1979年   151篇
  1978年   104篇
  1977年   105篇
  1976年   98篇
  1975年   71篇
  1974年   97篇
  1973年   53篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
91.
Abstract:  This study finds evidence of significant long-term underperformance following rights issues made during 1986-95 in the UK. The findings are resilient to a number of methodological controls. In contrast, our results for a smaller sample of open offers made during 1991-95 show strong positive performance over a 5-year post-issue period, implying that firms making open offers had better growth prospects than firms making rights issues. During 1986-90, a period when open offers were rarely used, firms appeared to be making rights issues to exploit overvaluation. However, this was not evident for rights issues made during 1991-95, a period when open offers were more commonly used.  相似文献   
92.
On April 1, 1988, New Zealand stopped the double taxation of dividends by implementing a full dividend imputation program. Because many believed that the tax advantage of debt had led to more highly leveraged firms subject to greater financial risk than was socially optimal, it was hoped the removal of incentives to finance with debt would result in a more efficient allocation of capital. The empirical results suggest that the shareholder wealth gain from dividend imputation was more than offset in firms with large debt levels. Moreover, an examination of debt ratios indicates debt levels declined in the post–imputation period.  相似文献   
93.
Traditional methods of estimating market volatility use daily return observations from a stock index to calculate monthly variance. We break with tradition and estimate stock market volatility using the daily, cross-sectional standard deviation of returns for all firms trading on the New York Stock Exchange and the American Stock Exchange. We find a significantly positive relation between risk and return. Market volatility is estimated to be about half the volatility level previously reported. The intraday, cross-sectional market volatility measure provides findings consistent with risk-return theory.  相似文献   
94.
95.
96.
This paper presents some estimates of international trade in banking services. We use IMF data on assets and liabilities of both domestic banks and non-banks with foreign banks, and of foreigners with the domestic banking system to construct measures of the volume of transactions on which banking intermediation services are provided across national borders. We then use estimates of the spread between borrowing and lending rates for depositors and borrowers with the financial institutions involved to estimate the value of international flows of intermediation services. Estimates are presented for 1982–84 and 1991–93 for the U.S., the U.K., and Canada.  相似文献   
97.
This paper incorporates an ecosystem model into a model of a simple economy. The decisionmaking agents in the ecosystem are individual organisms aggregated to the species level. A species may provide utility directly to humans, or it may provide utility indirectly because it is used either as a raw material in goods fabrication or as sustenance for other species. We describe a comparative static equilibrium of the ecosystem where species' demands for other species are equal to the supplies of those other species, and energy is conserved. The ecosystem is then embedded in the economy so that the effects of human intervention can be traced through both the ecosystem and the economy. Human intervention creates ecosystem externalities such that ecosystem equilibria are shifted and the new equilibria affect the utility or the production processes of other humans. This framework allows us to describe in principle which ecosystem services can be efficiently usurped by humans, which waste flows can be efficiently allowed into ecosystems, and which ecosystem organisms and physical attributes can be efficiently maintained.  相似文献   
98.
This study investigated how partners' self-reported opportunism and shared decision making varied by culture in international joint ventures (IJVs) with the Japanese. Data were gathered by a mail survey of senior officials in IJVs located in 11 host countries. Significant differences were found between partners from Western cultures and the Japanese, but not between other Asians and the Japanese. Indirect effects suggest that shared decision making neutralizes cultural tendencies toward opportunism. Results indicated that opportunistic tendencies did not diminish as the IJV relationship aged, and that shared decision making did diminish as the relationship aged.  相似文献   
99.
A systems model was estimated to determine the effects of declining U.S. retail beef demand on farm-level beef prices and production. Retail beef demand declined by nearly 66% from 1976 to 1999. Results indicate autonomous shifts in retail demand significantly impacted farm-level demands and production. Based on equilibrium multipliers, the 1976–99 reduction in beef demand decreased real slaughter cattle prices and production by 32.1% and 11.2%, respectively. Real feeder cattle prices and production decreased by 8.0% and 22.6%, respectively. Combining the decreases in farm prices and production, slaughter and feeder cattle producers experienced a real revenue reduction of $13.3 billion (61%) due to the long-term decline in demand.  相似文献   
100.
Dynamic futures‐hedging ratios are estimated across seven markets using generalized models of the variance/covariance structure. The hedging performances of the resultant dynamic strategies are then compared with static and naïve strategies, both in‐ and out‐of‐sample. Bayesian‐adjusted hedge ratios also are employed as error purgers. The empirical results indicate that the generalized dynamic models are well specified and that their use in determining optimal hedge ratios can lead to improvements in hedging performance as measured by the volatilities of the returns on the optimally hedged position. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:241–260, 2003  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