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   7139篇
  免费   252篇
财政金融   1352篇
工业经济   580篇
计划管理   1325篇
经济学   1591篇
综合类   49篇
运输经济   86篇
旅游经济   141篇
贸易经济   1208篇
农业经济   297篇
经济概况   732篇
邮电经济   30篇
  2023年   29篇
  2022年   29篇
  2021年   54篇
  2020年   94篇
  2019年   131篇
  2018年   171篇
  2017年   169篇
  2016年   181篇
  2015年   129篇
  2014年   198篇
  2013年   836篇
  2012年   269篇
  2011年   280篇
  2010年   262篇
  2009年   301篇
  2008年   244篇
  2007年   229篇
  2006年   231篇
  2005年   212篇
  2004年   203篇
  2003年   204篇
  2002年   176篇
  2001年   171篇
  2000年   145篇
  1999年   152篇
  1998年   132篇
  1997年   130篇
  1996年   135篇
  1995年   111篇
  1994年   118篇
  1993年   123篇
  1992年   98篇
  1991年   89篇
  1990年   87篇
  1989年   76篇
  1988年   74篇
  1987年   56篇
  1986年   70篇
  1985年   111篇
  1984年   107篇
  1983年   85篇
  1982年   81篇
  1981年   74篇
  1980年   82篇
  1979年   66篇
  1978年   56篇
  1977年   45篇
  1976年   45篇
  1975年   34篇
  1973年   38篇
排序方式: 共有7391条查询结果,搜索用时 46 毫秒
1.
Journal of Business Ethics - This article proposes a conceptual mapping to outline salient properties and relations that allow for a knowledge transfer from the well-established greenwashing...  相似文献   
2.
It is a wide-held assumption that professional development and change within purchasing and supply management (PSM) organisations can be explained and guided by a maturity model. In this paper the guidance which the maturity model concept offers to understand a PSM organisation's performance is assessed. The methodology is based on the outcomes of a literature review of PSM maturity models, development of an organisational change framework and the learning from three qualitative case studies. An alternative understanding of the development of the PSM organisation is offered through an organisational change framework, composing 1) movement transitions, 2) scalability of change, 3) acceptability of change, and 4) the substantive element of change. The research found that extant PSM maturity models are too rigid for PSM managers to apply, and although maturity models are commonly accepted in PSM literature, in practice, they may produce the opposite effect of what is promised. The PSM maturity models suggest that their application will lead to increased status and influence of PSM within the organisation; expectations that may not be met. PSM organisations’ change processes are subjected to a range of situational and contextual power relations which must be considered in order to advance the specific PSM organisation roles and responsibilities.  相似文献   
3.
The electric utility industry is in transition but needs to move even faster if the country is to meet its emissions goals. The industry has historically moved cautiously, but policies and regulatory approaches must avoid unintentionally reinforcing the status quo. Incentive‐oriented policies and redesigned regulations must balance environmental sustainability with economic sustainability. The authors draw on well‐established corporate finance principles to guide more effective policies. Shareholder‐focused utility executives must make investments conditioned by three elements: (1) the return on equity the utility can expect to make on each project; (2) the investors' required return on equity capital for each project; and (3) the size of the investment. The well‐established economic value added (EVA) model can assist policy analysis: V=(r‐k)I; where V is the shareholder value created, r is the return on equity, k is the return investors require if they are to invest in the stock, and I is the scale of the project. Any new incremental V translates into higher stock prices. All three elements of their model (i.e., risk, return, and scale) require attention by regulators and policymakers to create value for shareholders. The authors show how the right state policies could create powerful incentives for shareholder focused utility executives to support such transitions.  相似文献   
4.
We evaluate an agricultural extension program aimed at increasing on‐farm biodiversity in Alberta. Using reports prepared for program participants by the extension agency, customized surveys were used to collect data on whether recommended practices were adopted. Data were also collected from producers who were willing but unable to participate in the program due to its unexpected cancellation. A count model compared the number of practices adopted by participants and nonparticipants to evaluate the program's efficacy, and a probit model using participants’ adoption data were used to understand factors affecting adoption. Simple, low‐cost, and easily trialed practices were adopted at high rates, though some higher cost practices associated with observable benefits were also adopted at moderate or high rates. Farm‐specific characteristics, such as size, tenure, or group membership were also significantly linked to the likelihood of adoption. Results suggest that the extension program was successful in encouraging adoption of environmentally beneficial practices with caveats; project completion and quality were not verified, and decreasing marginal returns to extension efforts may have been realized within the small participant pool. Nous évaluons un programme d'éducation permanente en agriculture visant l'augmentation de la biodiversité fermière en Alberta. Utilisant des rapports préparés par les agences d'éducation pour les participants de programmes, des sondages individualisés ont servi à la collecte de données concernant l'adoption de pratiques recommandées. Des données ont aussi été recueillies auprès de producteurs qui auraient voulu participer mais qui n'ont pas profité du programme suivant son annulation inattendue. Un modèle de comptage a servi à comparer le nombre de pratiques adoptées par les participants et non‐participants pour évaluer l'efficacité du programme, et un modèle probit basé sur les données d'adoption par les participants a servi à comprendre les facteurs ayant un impact sur l'adoption. Les pratiques simples, peu coûteuses et faciles à tester ont été hautement adoptées. Certaines pratiques à coûts plus élevés, associées à des avantages observables, ont aussi vu des taux moyens et élevés d'adoption. Les caractéristiques spécifiques aux exploitations agricoles comme la taille, la longévité et l'adhésion à un groupe se sont aussi trouvées liées de façon significative aux probabilités d'adoption. Les résultats suggèrent que le programme d'éducation permanente a réussi à encourager l'adoption de pratiques bénéfiques pour l'environnement avec quelques bémols: la réalisation des projets et leur qualité n'ont pas fait l'objet de vérification, et la diminution des rendements marginaux en fonction des efforts d'éducation pourrait avoir été réalisée dans le cadre d'un petit bassin de participants.  相似文献   
5.
6.
The main objective of this paper it to model the dynamic relationship between global averaged measures of Total Radiative Forcing (RTF) and surface temperature, measured by the Global Temperature Anomaly (GTA), and then use this model to forecast the GTA. The analysis utilizes the Data-Based Mechanistic (DBM) approach to the modelling and forecasting where, in this application, the unobserved component model includes a novel hybrid Box-Jenkins stochastic model in which the relationship between RTF and GTA is based on a continuous time transfer function (differential equation) model. This model then provides the basis for short term, inter-annual to decadal, forecasting of the GTA, using a transfer function form of the Kalman Filter, which produces a good prediction of the ‘pause’ or ‘levelling’ in the temperature rise over the period 2000 to 2011. This derives in part from the effects of a quasi-periodic component that is modelled and forecast by a Dynamic Harmonic Regression (DHR) relationship and is shown to be correlated with the Atlantic Multidecadal Oscillation (AMO) index.  相似文献   
7.
Technology education in the New Zealand context has seen significant change since it’s inception as a technical subject. The changing nature of the subject in New Zealand secondary schools is influenced by some teachers’ preoccupation with the making of quality product outcomes, rather than their enactment of the curriculum, which conceptualises a wider remit. Research into the perceptions of technology teachers’ interpretation and enactment of the curriculum suggests that to enable change, teachers need to adopt a form of “technological thinking”, in support of their “technical thinking”. Technological thinking is a notion presented to support teachers to explore a range of differing pedagogical approaches and learning outcomes, reflective of the intent of the New Zealand curriculum, which aims to foster learning environments that are innovative and responsive to students’ social and academic needs.  相似文献   
8.
We investigate how R&D university – industry collaboration (R&D UIC) is influenced by labor market rigidity. While it is well-established that an educated and skilled workforce will facilitate R&D UIC, another aspect of these alliances has been under-researched: the role of labor market rigidity, in particular the difficulties employers face in hiring and firing workers. We hypothesize that the size of the R&D labor pool in a country will encourage R&D UIC, and that the ease with which employers are legally allowed to hire and fire will directly and indirectly influence R&D UIC. Integrating data from various sources, we test our model on a sample of 73 countries for which information on the size of the R&D labor pool and labor market regulations are available. We also conduct a robustness test using a different proxy for R&D labor pool on a larger sample of 109 countries. Results confirm the strong link between a country's R&D labor pool and R&D UIC, as well as direct negative impacts of hiring and firing rigidity and an indirect negative impact of hiring rigidity. The findings have implications for managers, policy makers, and researchers of R&D collaboration between universities and industry.  相似文献   
9.
We believe that what most authors have in mind when referring to the “most redistributive country” is a tax and transfer schedule that is most redistributive across all pre-tax and transfer income distributions. In order to measure each country's tax and transfer redistribution according to the same baseline, we suggest using the transplant-and-compare method of Dardanoni and Lambert (2002, Journal of Public Economics 86, 99–122) to establish a common base. The redistributive effects of countries’ tax and transfer schedules are illustrated by employing microdata on eight countries from the Luxembourg Income Study (LIS). Of these eight countries, Finland is found to be the most redistributive country, according to the common base method.  相似文献   
10.
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