全文获取类型
收费全文 | 31468篇 |
免费 | 377篇 |
专业分类
财政金融 | 5447篇 |
工业经济 | 1804篇 |
计划管理 | 4800篇 |
经济学 | 7090篇 |
综合类 | 978篇 |
运输经济 | 103篇 |
旅游经济 | 231篇 |
贸易经济 | 6527篇 |
农业经济 | 764篇 |
经济概况 | 3474篇 |
信息产业经济 | 45篇 |
邮电经济 | 582篇 |
出版年
2021年 | 86篇 |
2020年 | 190篇 |
2019年 | 261篇 |
2018年 | 2613篇 |
2017年 | 2396篇 |
2016年 | 1532篇 |
2015年 | 302篇 |
2014年 | 415篇 |
2013年 | 1570篇 |
2012年 | 821篇 |
2011年 | 2441篇 |
2010年 | 2207篇 |
2009年 | 1901篇 |
2008年 | 1935篇 |
2007年 | 2226篇 |
2006年 | 342篇 |
2005年 | 655篇 |
2004年 | 777篇 |
2003年 | 883篇 |
2002年 | 570篇 |
2001年 | 358篇 |
2000年 | 389篇 |
1999年 | 260篇 |
1998年 | 285篇 |
1997年 | 276篇 |
1996年 | 241篇 |
1995年 | 231篇 |
1994年 | 240篇 |
1993年 | 284篇 |
1992年 | 258篇 |
1991年 | 244篇 |
1990年 | 226篇 |
1989年 | 177篇 |
1988年 | 175篇 |
1987年 | 163篇 |
1986年 | 198篇 |
1985年 | 242篇 |
1984年 | 303篇 |
1983年 | 253篇 |
1982年 | 252篇 |
1981年 | 270篇 |
1980年 | 238篇 |
1979年 | 243篇 |
1978年 | 196篇 |
1977年 | 197篇 |
1976年 | 166篇 |
1975年 | 137篇 |
1974年 | 139篇 |
1973年 | 122篇 |
1972年 | 82篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
This paper examines the international trade of a variety of genetically modified (GM) food products over a 27-year period (1984–2011) with data from the United Nations using the tools of social network analysis. The results indicate that each of the different crops have a distinctive pattern of trade that has changed over time due to a number of different factors. Also, trade in agricultural commodities became more diversified over time, dominated less by the United States and other nations central in the trade networks and trade in the individual GM crops was stable over time. Countries maintained their trading partners for specific crops, despite the adoption of the genetically modified varieties. The economic implications of these results are discussed for specific countries. 相似文献
32.
Shashank Rao Allan Gulley Matthew Russell Justin Patton 《Journal of Business Logistics》2021,42(1):88-100
The ability to look into the supply chain has long enticed SCM scholars and practitioners. The possibilities created by such visibility are endless—from risk reduction and continuity planning to inventory management and cost reduction, nothing is off the table when end‐to‐end visibility is a possibility. Because of such enticements, there is usually much buzz in the industry every time a new technology that promises visibility and transparency is brought forward. Yet, years later, stories sometimes emerge that said technologies either failed to deliver or were not everything they were made out to be. Blockchain is yet another emerging technology in this space. Some consultants promise that it will be the final answer to the transparency and visibility woes that companies currently face. Yet, there is little empirical investigation regarding how the technology may benefit adopters, what the bottlenecks may be, and to what extent it may be able to deliver on these promises, without massive system‐wide upgrades of extant hardware and computing prowess. The current study takes a step in this direction by investigating a blockchain‐driven proof of concept across an industry consortium to identify promises, possibilities, and challenges of blockchain. 相似文献
33.
Supersaturated designs (SSDs) constitute an important class of fractional factorial designs that could be extremely useful in factor screening experiments. Most of the existing studies have focused on balanced designs. This paper provides a new lower bound for the \(E(f_{NOD})\)-optimality measure of SSDs with general run sizes. This bound is a generalization of existing bounds since it is applicable to both balanced and unbalanced designs. Optimal multi and mixed-level, balanced and nearly balanced SSDs are constructed by applying a k-circulant type methodology. Necessary and sufficient conditions are introduced for the generator vectors, in order to pre-ensure the optimality of the constructed k-circulant SSDs. The provided lower bounds were used to measure the efficiency of the generated designs. The presented methodology leads to a number of new families of improved SSDs, providing tools for directly constructing optimal or nearly-optimal k-circulant designs by just checking the corresponding generator vector. 相似文献
34.
Prior literature examined reciprocity in the context of value creation. However, research has yet to examine whether reciprocity exists in value sharing. To address this gap, the authors examine retailer’s reciprocal value sharing with its manufacturer in relation to new product introductions. The authors test, via a survey of retail managers, whether reciprocal value sharing is influenced by an interaction of manufacturer’s prior new product success with innovativeness of a manufacturer’s products and the frequency of new product introduction. The results indicate that a retailer’s reciprocal value sharing is greater when the manufacturer historically launched successful new products, and that this effect is decreased with the innovativeness of a manufacturer’s products but increased with the frequency of new product introduction. 相似文献
35.
36.
Axel Berger Tobias Schlager David E. Sprott Andreas Herrmann 《Journal of the Academy of Marketing Science》2018,46(4):652-673
Firms increasingly use games to interact with their customers. Yet, surprisingly little is known about whether, when, and how such “gamified” interactions engage consumers with a firm’s brand, thereby facilitating self–brand connections. Building on flow theory, we show that gamified interactions that are highly interactive and optimally challenging facilitate self–brand connections, because such games lead to emotional and cognitive brand engagement. A field study and three experiments across various product domains and game designs support our theory. We also identify conditions under which consumers do not become engaged with a brand, namely when firms restrict their decisional control either to voluntarily participate in the game (i.e., compulsory play) or to spend as much time as desired playing the game (i.e., time pressure). Our findings advance existing knowledge about the use of games in marketing and provide important implications for how marketers can harness their potential to build self–brand connections. 相似文献
37.
Weipeng Lin Jingjing Ma Qi Zhang Jenny Chen Li Feng Jiang 《Journal of Business Ethics》2018,152(4):1099-1115
Previous research has shown that virtuous leader behavior in the form of benevolent leadership has considerable impact on employee creativity. However, little is known as to how and under what conditions these constructs are linked. In the current research, we proposed and tested a moderated mediation model positing leader–member exchange (LMX) as a mediator, and employee power-distance orientation as a moderator of this relationship. Two studies were conducted to test our hypothesized model. In Study 1, repeated measured data collected from 284 Chinese employees in an information technology company demonstrated that benevolent leadership had a lagged effect on LMX. In Study 2, analyses of multisource and lagged data from 391 Chinese employees in 42 research and development teams, and their direct supervisors indicated that benevolent leadership was positively related to supervisor-rated employee creativity via LMX. In addition, the relationship between benevolent leadership and LMX was stronger for employees high in power-distance orientation. Theoretical implications of benevolent leadership’s research and practical contributions concerning promoting creativity in organizations where benevolent leaders prevail are also discussed. 相似文献
38.
Khat-chewing, a controversial leisure activity within the Somali diaspora in Britain, has received little attention within the academic field of Leisure Studies. This paper reports on ethnographic research to provide insights into the unique locations where young British-Somali men chew khat, exposing the liminal qualities of such localities. The paper begins with an overview of the contentious position khat-chewing occupies within Somali communities in Britain, highlighting reasons why young British-Somali men hide their association with the leisure practice. The discussion that follows considers how young male khat users conceptualise spatial environments, exposing how these locations temporarily produce a dual sense of privacy and sociality. The ambiences of such temporary leisure spaces remain open to the prospect of discovery, resulting in the use of discretionary tactics to maintain a sense of secrecy. In this context, we discuss how khat-chewing offers a sense of cultural identity and belongingness while also marking young British-Somali men as outsiders – even within their own communities. 相似文献
39.
40.
Journal of Financial Services Marketing - Purpose: The aim of this paper is to evaluate the success of a value proposition over time, considering two aspects: customer’s perceived value and... 相似文献