全文获取类型
收费全文 | 26391篇 |
免费 | 1443篇 |
国内免费 | 538篇 |
专业分类
财政金融 | 1640篇 |
工业经济 | 1781篇 |
计划管理 | 6934篇 |
经济学 | 5716篇 |
综合类 | 3289篇 |
运输经济 | 151篇 |
旅游经济 | 230篇 |
贸易经济 | 3360篇 |
农业经济 | 1491篇 |
经济概况 | 3780篇 |
出版年
2024年 | 78篇 |
2023年 | 542篇 |
2022年 | 684篇 |
2021年 | 964篇 |
2020年 | 1030篇 |
2019年 | 644篇 |
2018年 | 558篇 |
2017年 | 722篇 |
2016年 | 799篇 |
2015年 | 995篇 |
2014年 | 2206篇 |
2013年 | 2479篇 |
2012年 | 2259篇 |
2011年 | 2515篇 |
2010年 | 2024篇 |
2009年 | 1592篇 |
2008年 | 1673篇 |
2007年 | 1522篇 |
2006年 | 1355篇 |
2005年 | 1016篇 |
2004年 | 684篇 |
2003年 | 557篇 |
2002年 | 417篇 |
2001年 | 325篇 |
2000年 | 218篇 |
1999年 | 126篇 |
1998年 | 100篇 |
1997年 | 61篇 |
1996年 | 42篇 |
1995年 | 34篇 |
1994年 | 42篇 |
1993年 | 21篇 |
1992年 | 12篇 |
1991年 | 10篇 |
1990年 | 6篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 1篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 9篇 |
1983年 | 17篇 |
1982年 | 12篇 |
1981年 | 2篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
High firewood consumption for heating produces high levels of pollution in cities in central and southern Chile, with serious consequences for health and quality of life. Energy efficiency measures (EEMs) have been identified as the best strategy to reduce air pollution and maximize social benefits. However, their adoption has been slow. The objective of this article is to investigate household preferences for financial incentives needed to promote private investments in EEMs in Central-Southern Chilean households and study the role of energy savings and the uncertainty about potential savings in the investment decision, with the aim of finding solutions to increase the adoption of these technologies. We use a choice experiment to explore the trade-off between the investment costs, financial instruments, energy savings, and the uncertainty about achieving the theoretical savings provided by engineering and architectural models. The results show that financial instruments play the most important role in this decision, followed by the savings achieved by the retrofit. Householders prefer to finance their investments with a mix of their personal resources and medium-term credits, trying to avoid long-term commitments. Although uncertainty was found to be a significant variable, it seems to play a small role in the investment decision. 相似文献
2.
3.
传统方法在建筑材料供应链质量数据安全共享中应用效果不佳,不仅数据误码率比较高,而且数据共享时延比较长,无法达到预期的数据安全共享效果。为此提出基于区块链技术的建筑材料供应链质量数据安全共享方法。利用区块链技术对建筑材料供应链质量数据属性加密,建立建筑材料供应链质量数据安全共享链,整合建筑材料供应链质量数据加密、解密程序,通过对用户身份验证实现对质量数据安全共享,以此完成基于区块链技术的建筑材料供应链质量数据安全共享。实验证明,设计方法的数据误码率在1%以内,数据共享时延在1s以内,具有良好的数据安全共享效果。 相似文献
4.
Humanity faces ongoing and contemporaneous grand challenges. Occasionally, abrupt shocks escalate a grand challenge’s salience over others. Prior research has advocated forming partnerships to address grand challenges via responsible innovation. Yet, it remains unclear how temporal changes in the salience of a grand challenge impact innovation performances of partnerships. We address this research gap by bridging the literature on issue salience, responsible innovation and interorganizational relationships. We argue that shocks either aid or harm the performance of partnerships for responsible innovation depending on whether their domains are directly or indirectly affected. The Ebola outbreak in 2014 sets the empirical context to test our theory. We find that while the innovation performance of Ebola partnerships formed after the outbreak rose eleven-fold, the performance of partnerships treating Influenza fell by 84.9 per cent. Our theory and findings have immediate implications for today’s COVID-19 outbreak, cautioning against salience shifts among concurrent grand challenges. 相似文献
5.
6.
This study aims to establish various market segments based on consumers' attitudinal elements influencing the adoption of mobile payments (m-payments). It also examines the best discriminators between identified clusters of m-payment users. Three hundred and sixty m-payment users participated in the study. Cluster and discriminant analyses were employed for the analysis. The findings suggest that two segments are established, and strategies can be developed accordingly. The study provides marketers with numerous touchpoints to propagate the adoption of m-payment apps. It also comprehensively explains m-payment users in developing economies by superimposing the cohorts to Roger's diffusion of innovation model. 相似文献
7.
8.
9.
Analyzing publicly traded stocks in Korea surrounding IFRS adoption in 2011, we find that the gap between stock price and firm value, value-to-price (V/P) ratio, narrows following the IFRS adoption and that this narrowed gap is observed only for higher V/P firms. We further find that the return predictability of V/P decreases in the post-IFRS period. Using a path analysis, we report further evidence that mandatory IFRS adoption decreases idiosyncratic volatility and improves trading volume and market liquidity, thereby contributing to the narrowed gap between value and price. We conclude that IFRS adoption contributes to resolution of Korea discount. 相似文献
10.
Since the level of markets’ information efficiency is key to profiteering by strategic players, Shocks; such as the COVID-19 pandemic, can play a role in the nature of markets’ information efficiency. The martingale difference and conditional heteroscedasticity tests are used to evaluate the Adaptive form of market efficiency for four (4) major stock market indexes in the top four affected economies during the COVID-19 pandemic (USA, Brazil, India, and Russia). Generally, based on the martingale difference spectral test, there is no evidence of a substantial change in the levels of market efficiency for the US and Brazilian stock markets in the short, medium, and long term. However, in the long term, the Indian stock markets became more information inefficient after the coronavirus outbreak while the Russian stock markets become more information efficient. Intuitively, these affect the forecastability and predictability of these markets’ prices and/or returns. Thereby, informing the strategic and trading actions of stock investors (including arbitrageurs) towards profit optimization, portfolio asset selection, portfolio asset adjustment, etc. Similar policy implications are further discussed. 相似文献