全文获取类型
收费全文 | 3931篇 |
免费 | 157篇 |
专业分类
财政金融 | 520篇 |
工业经济 | 142篇 |
计划管理 | 759篇 |
经济学 | 871篇 |
综合类 | 14篇 |
运输经济 | 23篇 |
旅游经济 | 33篇 |
贸易经济 | 1126篇 |
农业经济 | 103篇 |
经济概况 | 271篇 |
邮电经济 | 226篇 |
出版年
2023年 | 39篇 |
2022年 | 32篇 |
2021年 | 52篇 |
2020年 | 72篇 |
2019年 | 80篇 |
2018年 | 207篇 |
2017年 | 203篇 |
2016年 | 210篇 |
2015年 | 136篇 |
2014年 | 190篇 |
2013年 | 538篇 |
2012年 | 174篇 |
2011年 | 179篇 |
2010年 | 206篇 |
2009年 | 172篇 |
2008年 | 159篇 |
2007年 | 126篇 |
2006年 | 76篇 |
2005年 | 78篇 |
2004年 | 67篇 |
2003年 | 78篇 |
2002年 | 90篇 |
2001年 | 60篇 |
2000年 | 72篇 |
1999年 | 47篇 |
1998年 | 35篇 |
1997年 | 27篇 |
1996年 | 30篇 |
1995年 | 20篇 |
1994年 | 29篇 |
1993年 | 25篇 |
1992年 | 22篇 |
1991年 | 27篇 |
1990年 | 28篇 |
1989年 | 24篇 |
1987年 | 14篇 |
1986年 | 17篇 |
1985年 | 25篇 |
1984年 | 19篇 |
1983年 | 27篇 |
1982年 | 29篇 |
1981年 | 26篇 |
1980年 | 18篇 |
1979年 | 26篇 |
1978年 | 15篇 |
1977年 | 18篇 |
1976年 | 26篇 |
1975年 | 18篇 |
1974年 | 15篇 |
1971年 | 16篇 |
排序方式: 共有4088条查询结果,搜索用时 234 毫秒
1.
In this paper we explore the micro-level determinants of conformity. Members of the social networking service Facebook express positive support to content on the website by clicking a Like button. We set up a natural field experiment to test whether users are more prone to support content if someone else has done so before. To find out to what extent conformity depends on group size and social ties we use three different treatment conditions: (1) one stranger has Liked the content, (2) three strangers have Liked the content, and (3) a friend has Liked the content. The results show that one Like from a single stranger had no impact. However, increasing the size of the influencing group doubled the probability that subjects expressed positive support. Friendship ties were also decisive. People were, on average, four times more likely to press the Like button if a friend, rather than a stranger, had done so before them. The existence of threshold effects in our experiment clearly shows that both group size and social proximity matters when opinions are shaped. 相似文献
2.
Without guaranteed compensation, granted by the German Renewable Energy Sources Act (Erneuerbare Energien Gesetz/EEG), biogas plants compete with all other plant types on the market for electrical energy. However, exchange-based electricity products do not currently permit an economically viable operation of biogas plants owing to their cost situation. 相似文献
3.
4.
Jonny Holmström 《Information and Organization》2018,28(2):107-110
In this article I argue that the quest to establish digital innovation as a research domain is hindered by three challenges. As digital innovation research we are too often: a) reifying the agency of digital innovation actors; b) developing explanations of digital innovation detached from the specifics of digital technology, and c) developing overly specific explanations of digital innovation. I begin by providing a brief overview of the recombination perspective and considering why this perspective holds great appeal in the digital age. I then engage with Henfridsson et al.'s (2018) value spaces framework as a platform for framing value creation and value capture in relation to recombination in digital innovation. Next, I push Henfridsson et al.'s arguments one step further to discuss them in relation to what I consider to be the key challenges for digital innovation research. Illustrating with some of my own recent projects, I suggest that in order to fully address these challenges we need to (1) develop explanations of digital innovation acknowledging the complexity of sociomaterial interaction in digital innovation; (2) develop explanations of digital innovation building on the specifics of digital technology, and (3) develop explanations of digital innovation based on an oscillation between the specific and the general. The article concludes by pointing to future challenges and developments for digital innovation research. 相似文献
5.
State-owned enterprises (SOEs) are commonly associated with undue advantages due to preferential treatment by the state. Simultaneously they are often quoted as handicapped given the notorious state interference, management problems and agency tensions. They used to be regarded as a mainly domestic issue but in the context of globalisation and the fact that states enter treaties with new obligations, SOEs’ performance ceased to be solely a domestic problem, increasingly so as state-owned multinational enterprises (SOMNEs) emerge. This article presents the results of research on Polish SOEs’ outward foreign direct investment (OFDI). It offers an overview of overseas activities of nine major Polish firms with a state stake and aims to contribute to the conceptual literature on foreign investments conducted by SOMNEs. We distinguish between FDI by SOMNEs as specific – privileged (facilitated) or discriminated (hampered) – investments subject to the home country’s state power and the host country’s state perception. 相似文献
6.
7.
Lisa Björkman 《International journal of urban and regional research》2018,42(2):276-294
Two decades ago, the rules governing the provision of piped municipal water supply in Mumbai became linked to the policy frameworks governing eligibility for a property titling scheme. This article outlines the ideological basis and practical implications of the shift, as well as the contradictions of the new regulatory regime. The article demonstrates how these contradictions have been mediated by the material and practical knowledge, embodied expertise, local authority and wide‐ranging socio‐political work of two sets of actors: municipal water engineers and a cast of characters known locally as ‘plumbers’. The social, political and hydraulic imaginaries animating the work of ‘plumbing’ are bound up with a temporal and spatial imaginary distinctly at odds with the network‐flow conception of hydraulic engineering within which the work of water supply planning and distribution in Mumbai is conceptualized, materialized and institutionalized. The hydraulic and legal contradictions of these clashing infrastructural idioms––of flow and event––have rendered the regulatory framework highly unstable. These contradictions eventually erupted in Mumbai's waterscape, leaving the city's water infrastructures suspended in a highly politicized state of limbo between dueling infrastructural imaginaries. 相似文献
8.
Fabian Hollstein Marcel Prokopczuk Björn Tharann Chardin Wese Simen 《European Journal of Finance》2019,25(10):937-965
We comprehensively analyze the predictive power of several option-implied variables for monthly S&P 500 excess returns and realized variance. The correlation risk premium (CRP) and the variance risk premium (VRP) emerge as strong predictors of both excess returns and realized variance. This is true both in- and out-of-sample. Our results also reveal that statistical evidence of predictability does not necessarily lead to economic gains. However, a timing strategy based on the CRP leads to utility gains of more than 5.03% per annum. Forecast combinations provide stable forecasts for both excess returns and realized variance, and add economic value. 相似文献
9.
Great hopes have been placed in the sharing economy to provide a new business model based on peer-to-peer (P2P) exchanges of underutilized assets. As a model, the sharing economy has been expected to make significant contributions to sustainability, providing new opportunities for entrepreneurship, more sustainable use of resources, and consumer co-operation in tight economic networks. However, in recent years, digital platforms have turned into the most important actors in the global sharing economy, turning global corporations, such as AirBnB, Booking, or TripAdvisor into intermediaries controlling and profiting from most transactions. Focused on accommodation, this paper conceptualizes the sharing economy in comparison to the wider collaborative economy, and discusses its social, economic, environmental, and political impacts in comparison to the sustainable development goals. It concludes that the sharing economy has great potential to make very significant contributions to sustainability, though the model is increasingly being replaced by the collaborative economy, which performs as an extension and acceleration of neoliberal economic practices. 相似文献
10.