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   2530篇
  免费   98篇
财政金融   409篇
工业经济   200篇
计划管理   514篇
经济学   593篇
综合类   18篇
运输经济   30篇
旅游经济   38篇
贸易经济   489篇
农业经济   73篇
经济概况   239篇
邮电经济   25篇
  2023年   18篇
  2022年   22篇
  2021年   34篇
  2020年   42篇
  2019年   69篇
  2018年   92篇
  2017年   81篇
  2016年   121篇
  2015年   75篇
  2014年   122篇
  2013年   348篇
  2012年   115篇
  2011年   117篇
  2010年   120篇
  2009年   117篇
  2008年   108篇
  2007年   111篇
  2006年   60篇
  2005年   56篇
  2004年   54篇
  2003年   72篇
  2002年   60篇
  2001年   42篇
  2000年   57篇
  1999年   54篇
  1998年   46篇
  1997年   33篇
  1996年   19篇
  1995年   22篇
  1994年   29篇
  1993年   25篇
  1992年   17篇
  1991年   17篇
  1990年   11篇
  1989年   14篇
  1988年   10篇
  1987年   13篇
  1986年   16篇
  1985年   19篇
  1984年   22篇
  1983年   19篇
  1982年   15篇
  1981年   14篇
  1980年   13篇
  1979年   9篇
  1978年   16篇
  1977年   6篇
  1976年   7篇
  1973年   4篇
  1972年   7篇
排序方式: 共有2628条查询结果,搜索用时 630 毫秒
91.
Theories of financial frictions in international capital markets suggest that financial intermediaries' balance sheet constraints amplify fundamental shocks. We present empirical evidence for such theories by decomposing the U.S. dollar risk premium into components associated with macroeconomic fundamentals, and a component associated with financial intermediary balance sheets. Relative to the benchmark model with only macroeconomic state variables, balance sheets amplify the U.S. dollar risk premium. We discuss applications to financial stability monitoring.  相似文献   
92.
Land-use change has a significant impact on the world’s ecosystems. Changes in the extent and composition of forests, grasslands, wetlands and other ecosystems have large impacts on the provision of ecosystem services, biodiversity conservation and returns to landowners. While the change in private returns to landowners due to land-use change can often be measured, changes in the supply and value of ecosystem services and the provision of biodiversity conservation have been harder to quantify. In this paper we use a spatially explicit integrated modeling tool (InVEST) to quantify the changes in ecosystem services, habitat for biodiversity, and returns to landowners from land-use change in Minnesota from 1992 to 2001. We evaluate the impact of actual land-use change and a suite of alternative land-use change scenarios. We find a lack of concordance in the ranking of baseline and alternative land-use scenarios in terms of generation of private returns to landowners and net social benefits (private returns plus ecosystem service value). Returns to landowners are highest in a scenario with large-scale agricultural expansion. This scenario, however, generated the lowest net social benefits across all scenarios considered because of large losses in stored carbon and negative impacts on water quality. Further, this scenario resulted in the largest decline in habitat quality for general terrestrial biodiversity and forest songbirds. Our results illustrate the importance of taking ecosystem services into account in land-use and land-management decision-making and linking such decisions to incentives that accurately reflect social returns.  相似文献   
93.
Traditionally, consumers used the Internet to simply expend content: they read it, they watched it, and they used it to buy products and services. Increasingly, however, consumers are utilizing platforms—such as content sharing sites, blogs, social networking, and wikis—to create, modify, share, and discuss Internet content. This represents the social media phenomenon, which can now significantly impact a firm's reputation, sales, and even survival. Yet, many executives eschew or ignore this form of media because they don’t understand what it is, the various forms it can take, and how to engage with it and learn. In response, we present a framework that defines social media by using seven functional building blocks: identity, conversations, sharing, presence, relationships, reputation, and groups. As different social media activities are defined by the extent to which they focus on some or all of these blocks, we explain the implications that each block can have for how firms should engage with social media. To conclude, we present a number of recommendations regarding how firms should develop strategies for monitoring, understanding, and responding to different social media activities.  相似文献   
94.
Based on empirical studies of firm exchange activities in business markets, this paper outlines a business network view of the firm-market relationship, which differs fundamentally from the view assumed by neo-classical economic theory. We define business networks as sets of connected business relationships. Thus business relationships and connections between relationships are the critical elements in the business network view. It is assumed, as suggested by the Uppsala internationalization process model, that an interplay between knowledge and commitment development is the mechanism that drives the relationship and network development process. Against this background the paper discusses how strategic change is analyzed in literature on alliances and networks. In conclusion the paper presents a set of propositions about strategy-making in business network settings.  相似文献   
95.
Adolescents are at a greater risk of being involved in traffic accidents than most other age groups, even before they start driving cars. This article aims to determine the factor structure of a self-report questionnaire measuring adolescent risky cycling behaviour, the ACBQ (Adolescent Cycling Behaviour Questionnaire). The questionnaire's structure was based on the widely used Driver Behaviour Questionnaire (DBQ). A sample of secondary school students (N?=?1749; age range: 13-18 years) filled out the questionnaire. Factor analysis revealed a three-factor structure underlying the questionnaire, which was confirmed on two equally large portions of the entire sample. These three underlying factors were identified as errors, common violations and exceptional violations. The ACBQ is a useful instrument for measuring adolescents' risky cycling behaviour.  相似文献   
96.
Forest management poses particular challenges as the pressure on forests is huge due to deforestation. In this context, the establishment of protected areas is a common conservation measure where institutions are put in place and sanctions regarding forest use are enforced. This paper focuses on the practice of sustainable forest management and the associated perspectives of local institutions at the rainforest margins of Lore Lindu National Park (LLNP) in Central Sulawesi, Indonesia.  相似文献   
97.
Due to land use effects, bioenergy use may cause adverse effects on biodiversity, soil and water and may even fail to guarantee a GHG emissions reduction compared to fossil fuel use. Accounting methodologies and policy instruments were elaborated to prevent these effects, but there is still no sound and consensual methodology to take into account indirect land use change that substantially contributes to GHG emissions as well as a loss of biodiversity. While the iLUC hypothesis, that is the potentiality of adverse effects arising from indirect land use change related to biomass cultivation, is hardly subject to dispute, the quantification of these effects and especially their policy implications are however contentious. Hence, bioenergy policies worldwide face a dilemma: Neglecting iLUC effects that do in fact exist or taking them into account although no sound methodology is available? The article covers the current state of the discussion and also analyses the approaches developed for taking indirect land use change into account. Assessment criteria for coping with the iLUC dilemma are developed and policy recommendations are derived from that.  相似文献   
98.
Summary  This paper assesses how the Dutch system of occupational pensions redistributes between and within generations. The approach in this paper deviates from the usual approach by incorporating the full life cycle in the measurements, rather than only the annual effects. In order to quantify redistribution, we use the level of educational attainment, gender and age to classify the pension fund population. For all groups distinguished, we measure in present value terms the average net benefit from participating in occupational pensions. The results indicate a sizable redistribution from males to females and from low educated to higher educated workers. On a lifetime basis, the impact of intergenerational transfers is modest. I am grateful to the two anonymous referees, Ed Westerhout, Casper van Ewijk, Lex Meijdam, Yvonne Adema and Peter Kooiman for their helpful comments on earlier drafts of this paper, and to Andre Nibbelink for his valuable computational assistance.  相似文献   
99.
We investigate the general structure of optimal investment and consumption with small proportional transaction costs. For a safe asset and a risky asset with general continuous dynamics, traded with random and time‐varying but small transaction costs, we derive simple formal asymptotics for the optimal policy and welfare. These reveal the roles of the investors' preferences as well as the market and cost dynamics, and also lead to a fully dynamic model for the implied trading volume. In frictionless models that can be solved in closed form, explicit formulas for the leading‐order corrections due to small transaction costs are obtained.  相似文献   
100.
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