全文获取类型
收费全文 | 7051篇 |
免费 | 170篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 1546篇 |
工业经济 | 687篇 |
计划管理 | 1202篇 |
经济学 | 1339篇 |
综合类 | 110篇 |
运输经济 | 57篇 |
旅游经济 | 111篇 |
贸易经济 | 1229篇 |
农业经济 | 350篇 |
经济概况 | 589篇 |
邮电经济 | 2篇 |
出版年
2023年 | 35篇 |
2021年 | 39篇 |
2020年 | 92篇 |
2019年 | 117篇 |
2018年 | 143篇 |
2017年 | 130篇 |
2016年 | 158篇 |
2015年 | 101篇 |
2014年 | 145篇 |
2013年 | 834篇 |
2012年 | 215篇 |
2011年 | 234篇 |
2010年 | 209篇 |
2009年 | 241篇 |
2008年 | 245篇 |
2007年 | 217篇 |
2006年 | 213篇 |
2005年 | 181篇 |
2004年 | 181篇 |
2003年 | 180篇 |
2002年 | 215篇 |
2001年 | 172篇 |
2000年 | 156篇 |
1999年 | 169篇 |
1998年 | 135篇 |
1997年 | 135篇 |
1996年 | 119篇 |
1995年 | 114篇 |
1994年 | 100篇 |
1993年 | 105篇 |
1992年 | 99篇 |
1991年 | 85篇 |
1990年 | 84篇 |
1989年 | 75篇 |
1988年 | 80篇 |
1987年 | 76篇 |
1986年 | 85篇 |
1985年 | 125篇 |
1984年 | 110篇 |
1983年 | 113篇 |
1982年 | 85篇 |
1981年 | 87篇 |
1980年 | 95篇 |
1979年 | 77篇 |
1978年 | 90篇 |
1977年 | 103篇 |
1976年 | 52篇 |
1975年 | 56篇 |
1974年 | 65篇 |
1973年 | 45篇 |
排序方式: 共有7222条查询结果,搜索用时 0 毫秒
871.
872.
Richard T. Woodward Yong-Suhk Wui Wade L. Griffin 《American journal of agricultural economics》2005,87(1):48-60
Facilitated by remarkable increases in computational speed, simulation models are becoming more and more complex and are being increasingly used in applied economic analysis. However, computational limitations remain a major barrier to the study of dynamically optimal policies. We study the problem of carrying out dynamic optimization in conjunction with large simulation models and propose a method for working around the computational difficulties that arise in such problems. Our methods are applied to a model of the Gulf of Mexico's red snapper fishery to study the dynamically optimal total allowable catch. 相似文献
873.
874.
875.
Ted Haggblom Roger J. Calantone C. Anthony Di Benedetto 《Journal of Product Innovation Management》1995,12(4):323-333
In the quest for successful innovation, the importance of the R&Dlmarketing interface is virtually unquestioned. For many organizations, however, effective integration of technical and marketing functions is difficult, if not impossible. Despite seemingly widespread understanding of fundamental new product principles, some companies still manage to gain a larger share of the market than their competitors. This raises the question of whether managers in more successful companies have special insights into R&D'/'marketing interface principles that give them an edge over their competitors. To gain a better understanding of managers' perceptions of new product principles defined in the academic literature, Ted Haggblom, Roger J. Calantone, and C. Anthony Di Benedetto conducted a survey of 687 nonacademic members of the Product Development and Management Association. The basis for the survey was a set of 78 product management principles compiled from a search of more than 500 books and articles from various disciplines. From this survey, 14 of the 78 principles were selected as relevant to the study reported in this article. The principles discussed in this article involve such issues as resistance to change, short-term orientation, communication and trust between marketing and technical people, the effect of centralized decision-making on innovation, the importance of open communication flows, senior management's role in the R&D I marketing interface, and the necessity of a product champion. The primary quesstion addressed in this study is whether managers from successful companies perceive these principles differently from managers of less successful firms. The study provides partial support for the proposition that managers' perceptions of these new product principles depend on their company's success. In other words, the survey results suggest that managers in companies with higher market shares tend to agree more strongly with these principles than their counterparts in less successful firms. The study also explores the relationship between firm size and agreement with these principles of new product success. Specifically, the study assesses whether the perceptions of managers from smaller, more entrepreneurial companies differ from those of managers in larger companies. Although managers from small and large firms may view these principles from different perspectives, there were no statistically significant differences in the perceptions of managers from small and large firms. 相似文献
876.
877.
We examine the stock market reaction to 1227 inter-corporate ordinary business contract announcements reported by Dow Jones between January 1, 1990 and December 31, 2001. Around contract announcement dates, we find statistically significant positive average abnormal returns and abnormal trading volume for contractors, but insignificant positive abnormal returns and negative abnormal volume for contractees. Cross-sectionally, contract announcement period returns are higher for contractors who are small relative to the contract size, have higher return volatility, larger market-to-book ratios and higher profitability. The announcement period returns of contract-awarding firms are not significant and are only marginally related to cross-sectional explanatory factors. The results are consistent with two explanatory stories: contractor quasi-rents induced by the winner's curse and information signalling about contractor production costs. The results are not consistent with perfect competition, with contracts having positive net present values for both parties, and with a version of incomplete contracting theory. 相似文献
878.
In this paper, we develop a framework in which one can examine the source of industry and country diversification by examining their underlying return components. We find that the global cash flow factor explains on average 39% of the variation of country cash flows and global discount rates explain 55% of the variation of country discount rates. These are much less than the explanatory power of the two factors over industry cash flow and discount rate variations, which are 72% and 78% respectively. This suggests that global factors are much less important for return components at country level than at the industry level. As a result, both better diversification of expected returns and cash flows across countries determine the larger benefits of country diversification versus industry diversification. Moreover, emerging markets tend to have much smaller co‐movements of both dividends and expected returns with those of the world, suggesting a lower degree of integration with the world goods and financial markets. Our results cast doubt on the prevailing wisdom that country diversification should be replaced by industry diversification. 相似文献
879.
880.
IT业务外包已成为越来越普遍的现象,然而,企业从外包中获得好处的愿望能否成真?企业的商务环境是否发生了彻底变化?BCG专家经过研究认为,如果你对上述任一问题的答案是肯定的,那现在就到了你对上一次IT外包举措进行批判性审视的时候了。 相似文献