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   50375篇
  免费   1117篇
  国内免费   13篇
财政金融   9196篇
工业经济   3905篇
计划管理   8592篇
经济学   11260篇
综合类   633篇
运输经济   402篇
旅游经济   902篇
贸易经济   8197篇
农业经济   2508篇
经济概况   5816篇
邮电经济   94篇
  2021年   341篇
  2020年   601篇
  2019年   811篇
  2018年   1073篇
  2017年   1114篇
  2016年   1051篇
  2015年   764篇
  2014年   1130篇
  2013年   5108篇
  2012年   1399篇
  2011年   1533篇
  2010年   1316篇
  2009年   1519篇
  2008年   1592篇
  2007年   1437篇
  2006年   1320篇
  2005年   1220篇
  2004年   1161篇
  2003年   1194篇
  2002年   1091篇
  2001年   1032篇
  2000年   1045篇
  1999年   919篇
  1998年   912篇
  1997年   911篇
  1996年   878篇
  1995年   795篇
  1994年   833篇
  1993年   826篇
  1992年   787篇
  1991年   801篇
  1990年   717篇
  1989年   619篇
  1988年   586篇
  1987年   615篇
  1986年   608篇
  1985年   881篇
  1984年   883篇
  1983年   866篇
  1982年   816篇
  1981年   724篇
  1980年   679篇
  1979年   699篇
  1978年   567篇
  1977年   532篇
  1976年   440篇
  1975年   387篇
  1974年   383篇
  1973年   354篇
  1972年   260篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
961.
The present study investigates impacts of attitudinal and perceptual characteristics of residential electricity consumers on their intention to use a green power tariff/supplier in the future. The work rests on a standardized telephone survey of 267 household electricity consumers of a German power supplier. Multivariate Partial Least Squares analysis indicates that, regardless of a person’s level of actual power consumption in the recent past, the intention to use green electricity is significantly higher among customers who have a positive general attitude towards environmental protection measures and who report an endorsing valuation of green power by their close social contacts. In a subsample of participants with a low actual electricity consumption in the year preceding the survey the intention to use green energy is significantly positively affected by the weight an individual attaches to electricity prices in one’s own supplier selection decisions and the person’s belief that one’s present power company takes over social responsibility. In contrast, in the subgroup of respondents with a high actual electricity consumption customers’ intention to use green energy is significantly enhanced by the degree of perceived dissimilarity among power company offerings. The findings are used to derive suggestions for green energy marketing measures of power companies and future energy consumer research.  相似文献   
962.
Telecommunication services have existed as a legal monopoly nearly throughout its entire history. In 1998, telecom market liberalisation was achieved across the European Union (EU) through the introduction of competition among telephone services. Asymmetrical obligations were deemed necessary in order to compensate the market power of the former monopolist.As the evolution of asymmetrical regulation in Spain illustrates, obligations and the telecommunications operators subject to them increased with the regulatory framework established in 2002 in the EU. This new regulatory framework may continue to expand through the inclusion of functional separation as another possible asymmetrical obligation. In short, it seems that the regulatory pressure on the telecommunications industry is increasing, despite the lapse in time since the liberalisation of the industry.In this paper, a methodology developed by the Austrian School of Economics is applied in order to explain why the telecommunication market is subject to increasing regulation in Europe, rather than deregulation, after more than 10 years of liberalisation. In particular, Mises's theory of price control is used to explain the evolution of the regulation of local loop unbundling.  相似文献   
963.
Books reviewed in this issue:
  • Going Lean: How the Best Companies Apply Lean Manufacturing Principles to Shatter Uncertainty, Drive Innovation, and Maximize Profits

  • Ready, Set, Dominate: Implement Toyota's Set-Based Learning for Developing Products and Nobody Can Catch You!

  • Market Rebels: How Activists Make or Break Radical Innovations

  相似文献   
964.
965.
In the United States, regulation prevented the railroad and film industries from responding successfully to the demands of the marketplace. Both industries did attempt to move into other industries, but were blocked by government regulations. The prevailing belief among marketing scholars that the rail and film companies were myopic cannot be substantiated by historic evidence.  相似文献   
966.
This study empirically examines the determinants of heterogeneous firm‐level cooperative R&D commercialization strategies. While the volume of interfirm collaboration has increased dramatically in recent decades, the determinants of firm‐level choices among alternate modes of such cooperative activity remain relatively understudied. We develop a conceptual model of factors determining collaborative mode choice at the organizational portfolio level. These factors include the firm‐level appropriation environment, in which deal‐level choices have portfolio‐level spillover implications, as well as governance capabilities developed by the firm over time. Using a random sample of innovating biotechnology start‐ups, we assemble a firm‐year panel dataset that aggregates transaction‐level collaboration data to the firm‐year level, allowing us to characterize firms' portfolios of collaborative deals. We find broad empirical support for our model, suggesting that a firm's appropriation environment and governance capabilities strongly influence portfolio‐level collaboration mode choices. In addition, we explore the implications of governance capability development, finding that experience with particular modes, as well as deviations from existing capabilities, impact firm valuation. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   
967.
968.
969.
This paper examines the role of nonfundamentals‐based sentiment in house price dynamics, including the well‐documented volatility and persistence of house prices during booms and busts. To measure and isolate sentiment's effect, we employ survey‐based indicators that proxy for the sentiment of three major agents in housing markets: home buyers (demand side), home builders (supply side), and lenders (credit suppliers). After orthogonalizing each sentiment measure against a broad set of fundamental variables, we find strong and consistent evidence that the changing sentiment of all three sets of market participants predicts house price appreciation in subsequent quarters, above and beyond the impact of changes in lagged price changes, fundamentals, and market liquidity. More specifically, a one‐standard‐deviation shock to market sentiment is associated with a 32–57 basis point increase in real house price appreciation over the next two quarters. These price effects are large relative to the average real price appreciation of 71 basis points per quarter observed over the full sample period. Moreover, housing market sentiment and its effect on real house prices is highly persistent. The results also reveal that the dynamic relation between sentiment and house prices can create feedback effects that contribute to the persistence typically observed in house price movements during boom and bust cycles.  相似文献   
970.
We compute the value of fiscal multipliers (for government primary expenditure, Income and wealth taxes and for Production and import taxes) in the Eurozone countries since the creation of the currency union (2000Q1-2016Q4), in order to understand how the values can vary according to the public debt level, the pace of economic growth, and the output gap. Imposing quarterly fiscal shocks, the results showed that government expenditure had a positive effect on output, with an annual accumulated multiplier of 0.44, whereas tax multipliers presented negative signs: the Income and wealth and the Production and import taxes stood at ?0.11 and ?0.55, respectively. Furthermore, the spending multiplier showed a higher value for countries with lower levels of public debt, during recessions, and in countries with negative output gaps. On the other hand, tax shocks seemed to be recessive in highly indebted countries and those facing positive output gaps.  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