全文获取类型
收费全文 | 138974篇 |
免费 | 3951篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 26156篇 |
工业经济 | 11704篇 |
计划管理 | 22250篇 |
经济学 | 29788篇 |
综合类 | 1463篇 |
运输经济 | 967篇 |
旅游经济 | 2506篇 |
贸易经济 | 24411篇 |
农业经济 | 6138篇 |
经济概况 | 17086篇 |
信息产业经济 | 8篇 |
邮电经济 | 449篇 |
出版年
2021年 | 884篇 |
2020年 | 1683篇 |
2019年 | 2430篇 |
2018年 | 2484篇 |
2017年 | 2673篇 |
2016年 | 2853篇 |
2015年 | 2182篇 |
2014年 | 3524篇 |
2013年 | 15628篇 |
2012年 | 4301篇 |
2011年 | 4280篇 |
2010年 | 3862篇 |
2009年 | 4453篇 |
2008年 | 4020篇 |
2007年 | 3343篇 |
2006年 | 3625篇 |
2005年 | 3617篇 |
2004年 | 3158篇 |
2003年 | 2933篇 |
2002年 | 2915篇 |
2001年 | 2679篇 |
2000年 | 2640篇 |
1999年 | 2507篇 |
1998年 | 2359篇 |
1997年 | 2375篇 |
1996年 | 2230篇 |
1995年 | 2029篇 |
1994年 | 2066篇 |
1993年 | 2019篇 |
1992年 | 2084篇 |
1991年 | 1981篇 |
1990年 | 1848篇 |
1989年 | 1707篇 |
1988年 | 1622篇 |
1987年 | 1628篇 |
1986年 | 1710篇 |
1985年 | 2474篇 |
1984年 | 2337篇 |
1983年 | 2164篇 |
1982年 | 2025篇 |
1981年 | 1960篇 |
1980年 | 1914篇 |
1979年 | 1854篇 |
1978年 | 1665篇 |
1977年 | 1643篇 |
1976年 | 1423篇 |
1975年 | 1298篇 |
1974年 | 1196篇 |
1973年 | 1191篇 |
1972年 | 907篇 |
排序方式: 共有10000条查询结果,搜索用时 343 毫秒
21.
We study the effect of the educational diversity of managers on the performance of team‐managed mutual funds using a large sample of U.S. equity funds from 1994 to 2013. We consider diversity in terms of both final educational degree and field of educational specialisation. We find that, in general, both types of diversity have a positive impact on fund performance, and our results are robust over a wide range of performance metrics and changes in market conditions. 相似文献
22.
AbstractTraditional warranty analysis focuses on the reliability of a product and offers warranty designs that compensate a consumer if the item fails. We introduce the concept of a performance-based warranty (PBW) that guarantees that a product will operate at or above some baseline level of performance, such as a minimum energy efficiency for an appliance. We illustrate how consumer behavior can change in the presence of a PBW and define the parameters for which a manufacturer may increase revenue. Finally, we present an algorithm to solve for the optimal PBW design given a consumer’s belief about the expected performance of the product. 相似文献
23.
Alan P. Ker 《Revue canadienne d'agroeconomie》2021,69(1):17-17
President Biden was sworn in on January 20, 2021 after a 4‐year term by President Trump. Certainly, Trump's norm breaking presidency impacted Canada in significant ways and the agricultural sector was no exception. In this issue, we have a set of four short articles discussing the possible implications on Canadian agriculture of transitioning from a Trump to Biden presidency. Issues related to Canada‐U.S. agricultural trade, political norms and uncertainty, U.S. domestic support, participation in trade agreements, and U.S.‐China relations are all considered. 相似文献
24.
25.
Stefan Kurpjuweit Christoph G. Schmidt Maximilian Klckner Stephan M. Wagner 《Journal of Business Logistics》2021,42(1):46-70
Additive manufacturing (AM) appears to be a particularly attractive use case for blockchain. This research combines inductive in‐depth interviews with the Delphi method to explore what potentials blockchain technology in AM creates, which adoption barriers firms need to overcome, and how supply chains will be affected by the integration of these two potentially disruptive technologies. The results suggest opportunities that are related to intellectual property (IP) rights management, the monitoring of printed parts throughout their lifecycle, process improvements, and data security. The most important barriers for blockchain adoption in AM are an absence of blockchain‐skilled specialists on the labor market, missing governance mechanisms, and a lack of firm‐internal technical expertise. By addressing important limitations of AM, blockchain is expected to improve the competitiveness of AM in parts’ production, catalyzing the trend toward more decentralized manufacturing resulting in more agile, resilient, and flexible supply chains and reduced logistics costs. Beyond that, blockchain‐based AM platforms are expected to enhance supply chain visibility, drive supply chain digitalization, support supply chain finance, and contribute to the emergence of shared factory systems. 相似文献
26.
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
27.
28.
Gregory Brown Robert Harris Wendy Hu Tim Jenkinson Steven N. Kaplan David T. Robinson 《Journal of Financial Economics》2021,139(2):561-577
Private equity performance, both for buyouts and venture capital, has been highly cyclical: periods of high fundraising have been followed by periods of low performance. Despite this seemingly predictable variation, we find modest gains, at best, to pursuing realistic, investable strategies that time capital commitments to private equity. This occurs, in part, because investors can only time their commitments to funds; they cannot time when commitments are called or when investments are exited. There is a high degree of time-series correlation in net cash flows even across commitment strategies that allocate capital in a very different manner over time. 相似文献
29.
30.
Most development projects encounter a highly uncertain entitlement process that is largely uncontrollable by developers. In this study, entitlement is modeled as a separate stage within a compound real option, where developers begin with minimal control (maximum risk) and each successful stage increases control (decreases risk). We solve the model analytically, provide three‐dimensional numerical comparisons, and empirically test the model's predictions using hand collected rezoning petitions. Our main result refines the classic development option model: developers first invest early (secure entitlements) in order to obtain the option to subsequently delay investment (construct the optimal building at the optimal time). 相似文献