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   5022篇
  免费   1242篇
财政金融   937篇
工业经济   456篇
计划管理   1174篇
经济学   1277篇
综合类   6篇
运输经济   103篇
旅游经济   62篇
贸易经济   1345篇
农业经济   342篇
经济概况   562篇
  2023年   12篇
  2021年   80篇
  2020年   184篇
  2019年   516篇
  2018年   249篇
  2017年   393篇
  2016年   383篇
  2015年   396篇
  2014年   397篇
  2013年   647篇
  2012年   404篇
  2011年   363篇
  2010年   331篇
  2009年   236篇
  2008年   241篇
  2007年   193篇
  2006年   175篇
  2005年   153篇
  2004年   128篇
  2003年   117篇
  2002年   125篇
  2001年   108篇
  2000年   75篇
  1999年   33篇
  1998年   27篇
  1997年   19篇
  1996年   19篇
  1995年   14篇
  1994年   12篇
  1993年   7篇
  1992年   10篇
  1991年   12篇
  1990年   9篇
  1989年   9篇
  1987年   12篇
  1986年   11篇
  1985年   15篇
  1984年   16篇
  1982年   11篇
  1981年   11篇
  1980年   11篇
  1979年   8篇
  1978年   9篇
  1977年   9篇
  1976年   8篇
  1975年   9篇
  1973年   10篇
  1970年   6篇
  1969年   7篇
  1966年   5篇
排序方式: 共有6264条查询结果,搜索用时 15 毫秒
61.
While the benefits of being market oriented are largely accepted, a group of scholars and managers remain skeptical. Marketing scholars have sought to counter the criticisms leveled against market orientation (MO) by arguing that it has both responsive and proactive dimensions. However, few studies have empirically examined the complexity of the effects of these dimensions on firm performance. Drawing on theories of resource‐based advantage and organizational search behavior, this article advances understanding by arguing that responsive and proactive market orientations have curvilinear effects on product development performance, that their interaction may be positively related to product development performance, and that their effects on new product program performance are moderated differentially by the organizational implementation conditions and marketing function power. Survey results of 175 U.S. firms indicate support for most of the hypotheses. Specifically, whereas responsive MO has a U‐shaped relationship with new product program performance, proactive MO has an inverted U‐shaped relationship with new product program performance. Contrary to the arguments presented here, the interaction of both orientations is negatively related to new product program performance. This study finds that both orientations are needed; however, new product program performance is enhanced when one is at higher level and the other is at lower level. Finally, responsive MO is only positively related to new product program performance under specific conditions such as when strategic consensus among managers is high. On the other hand, the positive effect of proactive MO on new product program performance is further strengthened when learning orientation and marketing power are high. Overall, this study suggests that the effects of responsive and proactive MO on new product program performance are more complex than previously theoretically argued and empirically examined.  相似文献   
62.
We propose two novel approaches for feature selection and ranking tasks based on simulated annealing (SA) and Walsh analysis, which use a support vector machine as an underlying classifier. These approaches are inspired by one of the key problems in the insurance sector: predicting the insolvency of a non‐life insurance company. This prediction is based on accounting ratios, which measure the health of the companies. The approaches proposed provide a set of ratios (the SA approach) and a ranking of the ratios (the Walsh analysis ranking) that would allow a decision about the financial state of each company studied. The proposed feature selection methods are applied to the prediction the insolvency of several Spanish non‐life insurance companies, yielding state‐of‐the‐art results in the tests performed. Copyright © 2005 John Wiley & Sons, Ltd.  相似文献   
63.
A feature transformation method based on domain knowledge for arti?cial neural networks (ANNs) is proposed. The method of feature transformation based on domain knowledge converts continuous values into discrete values in accordance with the knowledge of experts in speci?c application domains. This approach effectively ?lters data, trains the classi?er, and extracts the rules from the classi?er. In addition, it reduces the dimensionality of the feature space, which not only decreases the cost and time in the operation but also enhances the generalizability of the classi?er. The experimental results of the proposed approach will be compared and tested statistically with the results of the linear transformation method. The results show that the method of feature transformation based on domain knowledge outperforms the linear transformation in modelling of ANNs. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   
64.
The Cuban economy has experienced a significant increase in foreign direct investment over the past decade due to the end of the Soviet Union and the establishment of more liberal trade policies. Although the U.S. embargo of trade with Cuba still exists, there has been movement lately that suggests the end of the four‐decades‐old policy. The purpose of this article is to analyze the current Cuban business environment and to identify potential entrepreneurial opportunities in the service sector. Major trade partners are also reviewed and managerial implications discussed. © 2006 Wiley Periodicals, Inc.  相似文献   
65.
For the purpose of equipping researchers in marketing with a more sophisticated method to measure alienation in a marketing context, the authors have constructed and initially tested an alienation from the marketplace index. Alienation is defined in terms of Melvin Seeman's (1959) five basic variants of alienation: powerlessness, meaninglessness, normlessness, social isolation, and self-estrangement. After pretesting, two questions per variant of alienation remained as the operational measures of alienation from the marketplace. These questions focused specifically on marketing phenomenon. Test-retest reliability was tested with 35 paired observations. Validity was checked with survey data from 140 households. In terms of face or content validity, the questions met the criterion of “looking as if” they should indicate the corresponding dimensions of alienation. Correlations between the marketplace alienation items and a measure of general alienation established concurrent validity. The authors propose that the use of the marketplace alienation index in studies involving those who are affected by our country's business climate may prove useful. For example, one would hypothesize that increasing alienation from the marketplace would be associated with support of consumerist goals, or even of additional government legislation to control problems that the individual feels is uncontrollable by him because of the bigness and indifference of modern day enterprise. Pepsico, Inc.  相似文献   
66.
67.
Recent empirical work suggests a predictive relationship between stock returns and output growth. We employ quarterly data from a panel of 27 countries to test whether stock returns as useful in predicting growth. Unlike previous research, our approach allows for the possible non-linear effect of recessions on the growth-return relationship. There is strong evidence to suggest that a linear model would be misspecified and provide potentially misleading inference. Using a switching regression approach, we find evidence that returns are most useful in predicting growth when the economy is in recession.First version received: November 2002/Final version received: April 2003This paper benefited greatly from discussions with Kalvinder Shields, Mark Harris, Pete Summers, and Vance Martin. Two anonymous referees provided useful comments on an earlier version of the paper for which we are grateful. The usual disclaimer applies to any errors and omissions. Funding from The University of Melbourne greatly assisted in the completion of this paper.  相似文献   
68.
This paper studies a link between inflation and economic activity that is built on two hypotheses. First, firms mitigate informational frictions in financial markets by accumulating retained earnings over a period of time. Second, firms allocate earnings among three competing uses - dividends, current investment, and the accumulation of internal funds - and inflation directly distorts this allocation decision as well as the real value of accumulated internal funds. The model predicts that the level of inflation - both unanticipated and expected inflation - as well as the variability of inflation distort firms’ internal financing decisions, increases frictions in financial markets, reduces the level and efficiency of investment, and reduces aggregate output. The marginal effects of inflation are increasing in the inflation rate.  相似文献   
69.
Global warming is currently an important item on most nationalenvironmental agendas. In many countries, coal-fired electricity generatingstations represent an important source of greenhouse gases. We examinehow regulations to curb emissions affect public utility pricing regulationwhen regulators act non-cooperatively. We show that, when there is limitedinformation on fixed abatement costs, an environmental regulator prefersan emission tax over an output tax or a lump sum environmental tax. Thepublic utility regulator prefers the lump sum tax regime.  相似文献   
70.
Fölster and Henrekson (European Economic Review 45 (2001), 1501-1520) argue that “...the more the econometric problems that are addressed, the more robust the relationship between government size and economic growth appears”. But in failing to control for simultaneity and in ignoring issues of sample-selection bias, the regressions reported by Fölster/Henrekson are flawed. Using theoretically valid instruments, we find that the estimated partial correlation between size of the public sector and economic growth is statistically insignificant and highly unstable across specifications. Moreover, since instruments are weak, all hypothesis tests are unreliable. We conclude that cross-country growth regressions are unlikely to come up with a reliable answer to the question of the growth effects of government spending and taxation.  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