全文获取类型
收费全文 | 5420篇 |
免费 | 149篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 922篇 |
工业经济 | 377篇 |
计划管理 | 858篇 |
经济学 | 1187篇 |
综合类 | 65篇 |
运输经济 | 29篇 |
旅游经济 | 63篇 |
贸易经济 | 832篇 |
农业经济 | 265篇 |
经济概况 | 953篇 |
邮电经济 | 19篇 |
出版年
2023年 | 33篇 |
2021年 | 39篇 |
2020年 | 72篇 |
2019年 | 122篇 |
2018年 | 138篇 |
2017年 | 156篇 |
2016年 | 147篇 |
2015年 | 83篇 |
2014年 | 158篇 |
2013年 | 536篇 |
2012年 | 187篇 |
2011年 | 232篇 |
2010年 | 187篇 |
2009年 | 186篇 |
2008年 | 157篇 |
2007年 | 154篇 |
2006年 | 127篇 |
2005年 | 95篇 |
2004年 | 97篇 |
2003年 | 96篇 |
2002年 | 90篇 |
2001年 | 114篇 |
2000年 | 103篇 |
1999年 | 82篇 |
1998年 | 94篇 |
1997年 | 70篇 |
1996年 | 67篇 |
1995年 | 89篇 |
1994年 | 60篇 |
1993年 | 83篇 |
1992年 | 76篇 |
1991年 | 76篇 |
1990年 | 69篇 |
1989年 | 67篇 |
1988年 | 62篇 |
1987年 | 65篇 |
1986年 | 70篇 |
1985年 | 78篇 |
1984年 | 90篇 |
1983年 | 61篇 |
1982年 | 67篇 |
1981年 | 64篇 |
1980年 | 74篇 |
1979年 | 63篇 |
1978年 | 45篇 |
1977年 | 46篇 |
1976年 | 37篇 |
1975年 | 48篇 |
1973年 | 40篇 |
1972年 | 32篇 |
排序方式: 共有5570条查询结果,搜索用时 15 毫秒
1.
Griffin Marybec Martino Richard J. LoSchiavo Caleb Comer-Carruthers Camilla Krause Kristen D. Stults Christopher B. Halkitis Perry N. 《Quality and Quantity》2022,56(4):2841-2852
Quality & Quantity - We used an internet-based survey platform to conduct a cross-sectional survey regarding the impact of COVID-19 on the LGBTQ?+?population in the United States.... 相似文献
2.
This article presents a medium-term forecast of the development of the Russian nanoindustry, taking into account the assumed transition of the industry from the formation stage to the investment growth stage. Problems associated with the estimated output volumes of products in the Russian nanoindustry are considered, since the trends recorded in the primary statistical data are very far from reflecting the real situation due to the imperfection of the system of statistics of nano-containing products, as well as a reduction of state funding and a decline in the intensity of research in the industry. It is concluded that a full-fledged industry has not been yet completely formed in Russia and it actually exists only as a statistical phenomenon; in addition, the project really set different objectives from the declared creation of a breakthrough high-technology branch. 相似文献
3.
4.
Effects of scale economies and production seasonality on optimal hub locations: the case of regional fresh produce aggregation 下载免费PDF全文
Interest in supporting local and regional food systems is rising and food hubs have attracted considerable attention among Federal, State, and local policymakers. This study explores the problem of endogenous hub location in fresh produce value chains in the Northeastern United States. To overcome limitations in the literature, we incorporate the effects of economies of scale and production seasonality into our models. Three experimental models are designed to examine the effects of alternatively applying yearly, quarterly, and monthly data on model solutions. We explicitly assess how interactions of scale economies and seasonality influence the structure and spatial attributes of an optimal regional produce aggregation hub system. The three models generate marketed different solutions and in many respects they lead to different conclusions about developing local/regional supply chains. The monthly model allows for production seasonality and actual hub operation cycle frequency and thus leads to more efficient hub solution with rich policy implications. 相似文献
5.
We propose a novel class of convex risk measures, based on the concept of the Fréchet mean, designed in order to handle uncertainty which arises from multiple information sources regarding the risk factors of interest. The proposed risk measures robustly characterize the exposure of the firm, by filtering out appropriately the partial information available in individual sources into an aggregate model for the risk factors of interest. Importantly, the proposed risks can be expressed in closed analytic forms allowing for interesting qualitative interpretations as well as comparative statics and thus facilitate their use in the everyday risk management process of the insurance firms. The potential use of the proposed risk measures in insurance is illustrated by two concrete applications, capital risk allocation and premia calculation under uncertainty. 相似文献
6.
MARK N. HARRIS HERVÉ LE BIHAN PATRICK SEVESTRE 《Journal of Money, Credit and Banking》2020,52(2-3):293-322
Price reviews are a potentially costly activity. A significant fraction of unchanged prices may stem from firms not reviewing prices, rather than from obstacles to changing prices per se, such as menu costs. In this paper, we disentangle these two causes of price stickiness by estimating an inflated ordered probit model on a panel of French manufacturing firms. The results point to a low frequency of price reviews, suggestive of the relevance of information costs as a determinant of the observed price stickiness. In view of the “inattentive producers” literature, pointing that the source of price rigidity matters, this is suggestive of a large real effect of monetary policy. 相似文献
7.
Conklin James Coulson N. Edward Diop Moussa Le Thao 《The Journal of Real Estate Finance and Economics》2020,61(1):1-38
The Journal of Real Estate Finance and Economics - In mortgage debt contracts, real property serves as collateral and the terms of mortgage financing are largely conditional on the certification of... 相似文献
8.
Bogin Alexander N. Shui Jessica 《The Journal of Real Estate Finance and Economics》2020,60(1-2):40-52
The Journal of Real Estate Finance and Economics - Accurate and unbiased property value estimates are essential to credit risk management. Along with loan amount, they determine a mortgage’s... 相似文献
9.
Kathryn Colley Katherine N. Irvine 《Leisure Sciences: An Interdisciplinary Journal》2019,41(3):186-202
Outdoor recreation provides a range of health and wellbeing benefits and facilitates engagement with natural environments. We explore older people's participation in outdoor recreation throughout their lives to examine how past experiences shape engagement later in life. A qualitative life history approach, consisting of semi-structured interviews and a focus group in three place-specific (urban, rural, and small town coastal) case studies in Scotland, was adopted. Thematic analysis revealed ways in which childhood experiences shaped adult engagement and highlighted life course transitions where behaviour change was most pronounced. Place and gender were considered as factors which may affect responses. Participants identified the points of getting married, becoming a parent, children entering adolescence, retirement, the onset of disabilities or ill health, and the death of others as “moments of change” in the extent and/or form of their outdoor recreation. The findings highlight potential for targeted interventions to promote outdoor recreation throughout life. 相似文献
10.
This study investigates the importance of mindfulness‐based organization systems and policies on the organization's continuous efforts to become a greener company. The study is devised as a pooled cross‐sectional time series analysis of productivity in energy consumption, water utilization, and waste generation and recycling of U.S. companies. The data set taken from U.S. Newsweek 500 recorded 600 companies dispersed into 63 industries during the period of 2012–2014 and provided 1,498 company–industry–year observations. The study found that systems and policies (e.g., deployment of third‐party auditors for its environmental metrics report; linkage of the remuneration of company's senior executive team with the achievement of environmental performance targets; and establishment of a committee at the Board of Directors' level whose mandate includes sustainability of the company in environment‐ and resource‐related matters) connect the company's mindfulness to its effort in improving the environmental quality through the company's productivity in energy consumption, water utilization, and waste generation and recycling. The relationships are positive and significant. Also, systems and policies serve as a motivator for the firm to continue to improve upon the current achievements. The study emphasizes the importance of translating organizational and individual mindfulness into organization policies and systems in order to motivate the organization to continuously improve its productivity in energy consumption, water utilization, and waste generation and recycling leading to improvements in environmental quality. 相似文献