全文获取类型
收费全文 | 12114篇 |
免费 | 291篇 |
专业分类
财政金融 | 2239篇 |
工业经济 | 917篇 |
计划管理 | 2001篇 |
经济学 | 2570篇 |
综合类 | 96篇 |
运输经济 | 62篇 |
旅游经济 | 204篇 |
贸易经济 | 1810篇 |
农业经济 | 582篇 |
经济概况 | 1896篇 |
邮电经济 | 28篇 |
出版年
2020年 | 124篇 |
2019年 | 170篇 |
2018年 | 199篇 |
2017年 | 220篇 |
2016年 | 221篇 |
2015年 | 164篇 |
2014年 | 245篇 |
2013年 | 1130篇 |
2012年 | 338篇 |
2011年 | 340篇 |
2010年 | 299篇 |
2009年 | 310篇 |
2008年 | 328篇 |
2007年 | 275篇 |
2006年 | 259篇 |
2005年 | 232篇 |
2004年 | 194篇 |
2003年 | 222篇 |
2002年 | 222篇 |
2001年 | 212篇 |
2000年 | 217篇 |
1999年 | 244篇 |
1998年 | 218篇 |
1997年 | 197篇 |
1996年 | 191篇 |
1995年 | 181篇 |
1994年 | 177篇 |
1993年 | 206篇 |
1992年 | 190篇 |
1991年 | 192篇 |
1990年 | 159篇 |
1989年 | 171篇 |
1988年 | 150篇 |
1987年 | 141篇 |
1986年 | 137篇 |
1985年 | 248篇 |
1984年 | 237篇 |
1983年 | 217篇 |
1982年 | 198篇 |
1981年 | 190篇 |
1980年 | 202篇 |
1979年 | 196篇 |
1978年 | 161篇 |
1977年 | 175篇 |
1976年 | 143篇 |
1975年 | 135篇 |
1974年 | 125篇 |
1973年 | 129篇 |
1971年 | 93篇 |
1970年 | 95篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Luz Maria Castro Fabian Härtl Santiago Ochoa Baltazar Calvas Leonardo Izquierdo Thomas Knoke 《Journal of Bioeconomics》2018,20(2):183-211
Bio-economic modelling has become a useful tool for anticipating the outcomes of policies and technologies before their implementation. Advances in mathematical programming have made it possible to build more comprehensive models. In an overview of recent studies about bio-economic models applied to land-use problems in agriculture and forestry, we evaluated how aspects such as uncertainty, multiple objective functions, system dynamics and time have been incorporated into models. We found that single objective models were more frequently applied at the farm level, while multiple objective modelling has been applied to meet concerns at the landscape level. Among the objectives, social aspects are seldom represented in all models, when being compared to economic and environmental aspects. The integration of uncertainty is occasionally a topic, while stochastic approaches are more frequently applied than non-stochastic robust methods. Most multiple-objective models do not integrate uncertainty or sequential decision making. Static approaches continue to be more recurrent than truly dynamic models. Even though integrating multiple aspects may enhance our understanding of a system; it involves a tradeoff between complexity and robustness of the results obtained. Land-use models have to address this balance between complexity and robustness in order to evolve towards robust multiple-objective spatial optimization as a prerequisite to achieve sustainability goals. 相似文献
12.
Using data for a sample of Malaysian stocks that are traded in both Malaysia and Singapore, we show that the turnover rate (trading volume relative to shares held) is significantly higher in the foreign market than in the domestic market. We also find that ownership of cross–listed shares by foreign investors is not motivated by diversification benefits. Instead, we find that the proportion of a firm's shares held in Singapore is directly related to the firm's level of systematic risk. 相似文献
13.
Christopher H. Wheeler 《Journal of Applied Econometrics》2003,18(1):79-104
Conventional urban economic analysis suggests that a local economy's size is closely related to a number of features, including levels of human capital and the availability of specialized inputs, which are likely to influence positively the rate at which it accumulates further economic activity. At the same time, urban theory also suggests that once cities reach a certain level of size, these agglomeration benefits begin to peter out, while diseconomies rise rapidly. Consequently, we should see an ‘inverted U‐shaped’ pattern of growth with respect to economic size—rates of growth first rise, then fall as size increases. This paper shows that, while such a pattern is largely absent from recent data on growth in metropolitan area population and employment, it emerges strikingly in county‐level data. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
14.
15.
16.
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
17.
We evaluate journals based on their relative contributions to top-level finance research in a recent period. Journals are ranked according to the number of citations found in articles published in Journal of Finance, Journal of Financial Economics, Journal of Financial and Quantitative Analysis, and Review of Financial Studies. The analysis controls for both the average number of articles and average number of words published annually in each cited journal. We identify the fifty most frequently cited journals during this period. We also list the fifty most frequently cited authors and articles and note topical trends in the research. 相似文献
18.
The value of a technology strategy has been increasingly discussed by R&D personnel and those involved in product development and business planning efforts. In this issue Albert Rubenstein and Americo Albala elevate this discussion by showing the importance of preparing a firm to compete by stressing the development of important, relevant technologies. Discovery and development must be channeled into areas that will be needed to support business initiatives likely to occur in the future. Albala stresses the importance of this change for the development of economies in nations that have been disappointed by the lack of success of importing technologies from more developed nations, while Rubenstein maintains that the pace of marketplace change requires a technology strategy in order to reduce the misapplication of scarce resources within the firm and the possibility of being blindsided by competitive developments. These essays continue a year-long series of contributions that the editor-in-chief solicited from members of the editorial board. Members were asked to reflect upon changes and opportunities that they see influencing our profession during the coming decade. Both of these short essays are designed to introduce new perspectives. It is not essential that you agree with the recommendations, but we hope that you are stimulated as you reflect on the issues they raise. 相似文献
19.
20.
The study finds that relative to others, firms pursuing the Prospector-like strategy (high innovation) have lower financial results uncertainty, a more long-term orientation for decision making, and more decentralized control. As well, the tightness of budgetary control is found to be negatively correlated with financial results uncertainty. Thus, we are able to reproduce in our study the result that Prospector type firms have tighter budgetary control, which many have found puzzling previously, and point to the relation between strategy and financial results uncertainty as an explanation for the result.Based on a sample of large firms in Singapore, the study also finds the impact of the 1997–1998 Asian crisis is correlated with the intensity with which the Prospector-like strategy was pursued. 相似文献