全文获取类型
收费全文 | 3926篇 |
免费 | 177篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 878篇 |
工业经济 | 317篇 |
计划管理 | 729篇 |
经济学 | 820篇 |
综合类 | 32篇 |
运输经济 | 57篇 |
旅游经济 | 49篇 |
贸易经济 | 755篇 |
农业经济 | 143篇 |
经济概况 | 295篇 |
信息产业经济 | 1篇 |
邮电经济 | 28篇 |
出版年
2023年 | 32篇 |
2022年 | 23篇 |
2021年 | 46篇 |
2020年 | 78篇 |
2019年 | 116篇 |
2018年 | 114篇 |
2017年 | 147篇 |
2016年 | 135篇 |
2015年 | 110篇 |
2014年 | 167篇 |
2013年 | 464篇 |
2012年 | 196篇 |
2011年 | 187篇 |
2010年 | 165篇 |
2009年 | 205篇 |
2008年 | 138篇 |
2007年 | 126篇 |
2006年 | 117篇 |
2005年 | 111篇 |
2004年 | 101篇 |
2003年 | 93篇 |
2002年 | 83篇 |
2001年 | 103篇 |
2000年 | 84篇 |
1999年 | 64篇 |
1998年 | 59篇 |
1997年 | 64篇 |
1996年 | 51篇 |
1995年 | 45篇 |
1994年 | 45篇 |
1993年 | 34篇 |
1992年 | 34篇 |
1991年 | 38篇 |
1990年 | 34篇 |
1989年 | 25篇 |
1988年 | 26篇 |
1987年 | 24篇 |
1986年 | 30篇 |
1985年 | 27篇 |
1984年 | 33篇 |
1983年 | 38篇 |
1982年 | 32篇 |
1981年 | 25篇 |
1980年 | 28篇 |
1979年 | 21篇 |
1978年 | 31篇 |
1977年 | 31篇 |
1976年 | 24篇 |
1975年 | 21篇 |
1973年 | 16篇 |
排序方式: 共有4104条查询结果,搜索用时 31 毫秒
151.
Speroni KG Lucas J Dugan L O'Meara-Lett M Putman M Daniel M Atherton M 《Nursing economic$》2011,29(1):15-20, 37
Ventilator-associated pneumonia (VAP) accounts for the majority of nosocomial pneumonias, which may increase intensive care and prolonged hospital stays. Endotracheal tubes allowing continuous subglottic suctioning may reduce VAP; however, they are more expensive than standard endotracheal tubes not allowing continuous suctioning. he objective of this study was to measure the comparative costs associated with continuous subglottic suctioning endotracheal tubes (CSS-ETT) versus standard endotracheal tubes (S-ETT) among intubated patients and whether cost differential is offset by the occurrence of VAP in patients receiving either type of intubation. A retrospective chart review was conducted for 154 intubated adult patients (77 = S-ETT; 77 = CSS-ETT). The S-ETT group had one case of VAP; the CSS-ETT group had none. The mean total hospital charges were higher for the S-ETT group ($103,600; CSS-ETT= $88,500) (p = 0.3). Although the average number of intubation days and ICU days were greater for the CSS-ETT group, there were no cases of VAP compared to the S-ETT group. ased upon the one S-ETT VAP case and the VAP attributable costs, it is cost effective to use the CSS-ETT. 相似文献
152.
153.
Martin Bodenstein 《Journal of International Economics》2011,84(2):160-177
A large class of international business cycle models admits multiple locally isolated deterministic steady states, if the elasticity of substitution between traded goods is sufficiently low. I explore the conditions under which such multiplicity occurs and characterize the dynamic properties in the neighborhood of each steady state. Models with standard incomplete markets, portfolio costs, a debt-elastic interest rate, or an overlapping generations framework allow for multiple steady states, if the model features multiple steady states under financial autarchy. If the excess demand for the foreign traded good is increasing in the good's own price in a given steady state, the equilibrium dynamics around this steady state are unbounded. Otherwise, the dynamics are bounded and unique. By contrast, with Uzawa-type preferences, the steady state is always unique and the associated equilibrium dynamics are always bounded and unique. The same results obtain under complete markets. 相似文献
154.
Martin Eisend 《Marketing Letters》2011,22(2):115-132
This study tests a cognitive and an affective model based on extant explanations of the effects of humor along with a new affective?Ccognitive model. Results are derived from meta-analytic data and show how previous explanations may be integrated in order to explain how humor in advertising works. Humor reduces negative cognitions related to the ad because it serves as a distraction from counter-argumentation. In order to maintain positive affect, humor reduces cognitive efforts, in particular those related to brand-related cognitions, thus supporting a vampire effect; that is, humor distracts from processing central benefits of the brand. Humor exerts its strongest impact along affective paths, supporting the dominance of affective mechanisms. Affect and cognition do interplay in line with a congruency effect where the impact of positive affect on attitudes towards the ad is mediated by positive cognitions. The models differ when they are performed based on data from studies using either real or fictitious stimuli. Depending on the type of stimuli, slight changes occur that can be explained by the lack or existence of prior brand experience. Overall, the integration of affect and cognitions into one model provides a better explanation than the previous solely cognitive or solely affective models. 相似文献
155.
Boris A. Portnov Kay W. Axhausen Martin Tschopp Moshe Schwartz 《Journal of Transport Geography》2011,19(6):1368-1378
This paper analyzes how location has affected, in the second half of the twentieth century, the population growth of 2889 municipalities in Switzerland. The analysis demonstrates the temporal relativity of location attributes, even for small territorial divisions, such as the Swiss cantons. However, we also show that, both absolute and relative location attributes have weakened over time as population growth predictors, apparently due to improving road infrastructures, and growing motorization. The study has been made possible by a detailed historical population and accessibility database available for Swiss municipalities. To the best of our knowledge, no database of such scope and quality is available for any other European country. 相似文献
156.
Methods and tools for integrated assessment of land use policies on sustainable development in developing countries 总被引:4,自引:0,他引:4
Pytrik Reidsma Hannes König Shuyi Feng Irina Bezlepkina Ingrid Nesheim Muriel Bonin Mongi Sghaier Seema Purushothaman Stefan Sieber Martin K. van Ittersum Floor Brouwer 《Land use policy》2011
For stimulating sustainable development in developing countries, land use patterns and land use changes are considered critical, and therefore effective and efficient land use policies are needed. In this paper we present a methodological framework that has been developed in a joint European and developing countries project (LUPIS – Land Use Policies and Sustainable Development in Developing Countries), to assess the impact of land use policies on sustainable development in developing countries. An illustrative application is presented for a case study in China, where water pollution due to agriculture in Taihu Basin is a major problem. 相似文献
157.
Alan J. Richardson 《Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l\u0027Administration》1986,3(2):304-316
I argue that the development of institutional theories of the formal structure of organizations have assumed that the implementation of institutional behaviours is a routine activity. This has resulted in a neglect of the problems facing organizations attempting to meet institutional demands. Data from a study of the adoption of professional institutions by accounting associations is used to identify four sources of problems in implementing institutional behaviours: (1) pragmatic difficulties; (2) conflicts with organizational “identities”; (3) inter-organizational conflicts; and, (4) intra-organizational conflicts. Résumé Cette étude soutient que les théories institutionnelles concernant les structures organisationnelles ont présumé que l'adoption de comportements institutionnels s'effectue de routine. Ceci a donc donnée lieu à un oubli des problèmes auxques doivent faire face les entreprises qui tentent de respecter les exigences institutionnelles. Les données d'une étude relative à l'adoption d'institutions professionnelles au sein d'associations comptables est utilisée pour identifier quatre sources de problèmes dans l'adoption de comportements institutionnels: (1) difficultés d'ordre pratique (2) conflits avec les diverses identités institutionnelles (3) conflits intra-organisationnels (4) conflits inter-organisationnels. 相似文献
158.
Mark F. Peterson James E. Martin 《Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l\u0027Administration》1986,3(2):204-220
Union member attachment research has generally examined large unions organizing large employers. The present study presents a conceptual model and related data concerning various aspects of the union attachment expressed by individuals in small bargaining units. The results show differences among individuals in commitment based on their union experiences and demographic characteristics. Résumé Les études traitant de la loyatué qu'éprouvent les membres envers leur syndicats examinent généralement des syndicats importants au sein d'entreprises de taille. La présente étude offre un modèle conceptuel et les données relatives aux divers aspects de la loyauté exprimée par des individus appartenant à de petites unités de négociations. Les résultats démontrent les différences de loyauté chez les membres selon leur experience syndicale et les caractéristiques démographiques. 相似文献
159.
160.