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   1799篇
  免费   145篇
财政金融   248篇
工业经济   99篇
计划管理   377篇
经济学   517篇
综合类   13篇
运输经济   28篇
旅游经济   38篇
贸易经济   412篇
农业经济   96篇
经济概况   107篇
邮电经济   9篇
  2024年   2篇
  2023年   32篇
  2022年   14篇
  2021年   35篇
  2020年   66篇
  2019年   110篇
  2018年   106篇
  2017年   123篇
  2016年   110篇
  2015年   70篇
  2014年   93篇
  2013年   256篇
  2012年   96篇
  2011年   121篇
  2010年   95篇
  2009年   80篇
  2008年   72篇
  2007年   75篇
  2006年   39篇
  2005年   38篇
  2004年   48篇
  2003年   35篇
  2002年   32篇
  2001年   33篇
  2000年   19篇
  1999年   21篇
  1998年   15篇
  1997年   16篇
  1996年   19篇
  1995年   9篇
  1994年   8篇
  1993年   11篇
  1992年   1篇
  1991年   5篇
  1990年   3篇
  1989年   3篇
  1988年   3篇
  1987年   1篇
  1986年   2篇
  1985年   6篇
  1984年   3篇
  1983年   1篇
  1982年   1篇
  1981年   3篇
  1980年   3篇
  1979年   3篇
  1978年   3篇
  1977年   1篇
  1974年   2篇
  1971年   1篇
排序方式: 共有1944条查询结果,搜索用时 15 毫秒
991.
992.
Quality & Quantity - Sensory evaluations are adopted in many fields for measuring and comparing sensory properties of products and improving their quality. The selection of panelists able to...  相似文献   
993.
Abstract

Background: Heart failure (HF) is a common, serious disease in the US and Europe. Patients with HF often require treatment for fluid overload, resulting in costly inpatient visits; however, limited evidence exists on the costs of alternative treatments. This study performed a cost-analysis of ultrafiltration (UF) vs diuretic therapy (DIUR-T) for patients with HF from the hospital perspective.

Methods: The model used clinical data from the literature and hospital data from the Healthcare Cost and Utilization Project to follow a decision-analytic framework reflecting treatment decisions, probabilistic outcomes, and associated costs for treating patients with HF and hypervolemia with veno-venous UF or intravenous DIUR-T. A 90-day timeframe was considered to account for hospital readmissions beyond 30?days. Sensitivity and scenario analyses were performed to gauge the robustness of the results.

Results: Although initial hospitalization costs were higher, fluid removal by UF reduced hospital readmission days, leading to cost savings of $3,975 (14.4%) at the 90-day follow-up (UF costs, $23,633; DIUR-T costs, $27,608).

Conclusions: UF is a viable alternative to DIUR-T when treating fluid overload in HF patients because it reduces hospital readmission rates and durations, which substantially lowers costs over a 90-day period compared to DIUR-T.  相似文献   
994.
995.
996.
We address the problem of ranking distributions of attributes in terms of poverty, when the attributes are represented by binary variables. To accomplish this task, we identify a suitable notion of “multidimensional poverty line” and characterize axiomatically the Head-Count and the Attribute-Gap poverty rankings, which are the natural counterparts of the most widely used income poverty indices. Finally, we apply our methodology and compare our empirical results with those obtained with some other well-known poverty measures.  相似文献   
997.
In malaria‐endemic countries about a quarter of test‐negative individuals take antimalarials (artemisinin‐based combination therapies [ACTs]). ACT overuse depletes scarce resources for subsidies and contributes to parasite resistance. As part of an experiment in Kenya that provided subsidies for rapid diagnostic test and/or for ACTs conditionally on being positive, we studied the association between beliefs on malaria status (prior and posterior the intervention) and decisions to get tested and to purchase ACTs. We find that prior beliefs do not explain the decision of getting tested (conditional on the price) and nonadherence to a negative test. However, test‐negative individuals who purchase ACTs report higher posterior beliefs than those who do not, consistent with a framework in which the formers revise beliefs upward, while the latters do not change or revise downward. We also do not find evidence that prior beliefs on ACT effectiveness and trust in test results play any major role in explaining testing or treatment behavior. Further research is needed to improve adherence to malaria‐negative test results.  相似文献   
998.
International Entrepreneurship and Management Journal - The paper examines several refugee experiences in Mexico and presents their reasons for leaving their home countries. A gap in research is...  相似文献   
999.
In recent years, the stakeholder approach has been widely applied in the debate on corporate social responsibility (CSR). Although many authors of this approach have reviewed many elements of the model, they have unconditionally accepted several criteria assumed by Freeman (1984) to identify stakeholders. In general, stakeholder authors have assumed that (a) the company establishes dyadic relationships with other agents, and (b) decisions made by a company only have foreseen and direct effects on other agents. These criteria have enabled researchers to understand simple processes. However, they have also prevented researchers from explaining how action comes about, and how responsibility is shared, in many complex processes taking place in contemporary societies. Such complex processes involve many agents, and each decision can generate unexpected effects which accumulate or disseminate. Furthermore, the normative structure governing these processes can affect and/or be affected by the actions of agents. In this study, we propose new criteria to expand the stakeholder model and facilitate the study of CSR in such processes.  相似文献   
1000.
This paper explores how marketing capabilities contribute to the international expansion of international new ventures, and influence their choice of entry mode. The study examines how marketing capabilities help international new ventures to use entry modes involving higher resource commitment in international markets. The proposed model was tested on country-level data from Spain. The results show that marketing capabilities contribute to a firm's decision to choose entry modes involving higher resource commitment in foreign markets. The paper also includes insights on antecedents of international new ventures’ choice of entry modes in foreign markets.  相似文献   
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