全文获取类型
收费全文 | 159657篇 |
免费 | 4270篇 |
国内免费 | 17篇 |
专业分类
财政金融 | 28364篇 |
工业经济 | 13172篇 |
计划管理 | 26703篇 |
经济学 | 33818篇 |
综合类 | 3601篇 |
运输经济 | 1064篇 |
旅游经济 | 2598篇 |
贸易经济 | 26040篇 |
农业经济 | 7769篇 |
经济概况 | 20475篇 |
信息产业经济 | 23篇 |
邮电经济 | 317篇 |
出版年
2021年 | 1437篇 |
2020年 | 2244篇 |
2019年 | 2755篇 |
2018年 | 2614篇 |
2017年 | 3097篇 |
2016年 | 3117篇 |
2015年 | 2685篇 |
2014年 | 4056篇 |
2013年 | 16382篇 |
2012年 | 6101篇 |
2011年 | 7122篇 |
2010年 | 6409篇 |
2009年 | 5929篇 |
2008年 | 5726篇 |
2007年 | 4828篇 |
2006年 | 5358篇 |
2005年 | 5218篇 |
2004年 | 3590篇 |
2003年 | 3298篇 |
2002年 | 3228篇 |
2001年 | 2990篇 |
2000年 | 2720篇 |
1999年 | 2556篇 |
1998年 | 2391篇 |
1997年 | 2418篇 |
1996年 | 2238篇 |
1995年 | 2017篇 |
1994年 | 2022篇 |
1993年 | 2014篇 |
1992年 | 2046篇 |
1991年 | 1948篇 |
1990年 | 1845篇 |
1989年 | 1687篇 |
1988年 | 1607篇 |
1987年 | 1607篇 |
1986年 | 1693篇 |
1985年 | 2479篇 |
1984年 | 2359篇 |
1983年 | 2152篇 |
1982年 | 2004篇 |
1981年 | 1938篇 |
1980年 | 1902篇 |
1979年 | 1844篇 |
1978年 | 1629篇 |
1977年 | 1618篇 |
1976年 | 1384篇 |
1975年 | 1274篇 |
1974年 | 1187篇 |
1973年 | 1186篇 |
1972年 | 894篇 |
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
101.
Daniel Hernndez‐Hernndez Harold A. Moreno‐Franco Jos‐Luis Prez 《Mathematical Finance》2019,29(4):1039-1065
We study the optimal execution problem with multiplicative price impact in algorithmic trading, when an agent holds an initial position of shares of a financial asset. The interselling decision times are modeled by the arrival times of a Poisson process. The criterion to be optimized consists in maximizing the expected net present value of the gains of the agent, and it is proved that an optimal strategy has a barrier form, depending only on the number of shares left and the level of the asset price. 相似文献
102.
Daniel A. Pellathy Diane A. Mollenkopf Theodore P. Stank Chad W. Autry 《Journal of Business Logistics》2019,40(2):81-104
The centrality of cross‐functional integration (CFI) to supply chain theory and practice has long been recognized. Yet researchers continue to struggle with consistently defining or measuring the CFI construct, thus limiting the utility of CFI research. This research develops (1) a comprehensive definition of CFI that synthesizes previous supply chain research and (2) a valid set of scale items that measure the conceptual domain outlined by this definition. The goal is to build a common foundation for extending knowledge on CFI's antecedents and consequences, and ultimately to improve scholars’ ability to guide a broader practitioner community still struggling to achieve integration in their organizations. 相似文献
103.
104.
Both soft, noncontractible, and hard, contractible, information are informative about managerial ability and future firm performance. If a manager's future compensation depends on expectations of ability or future performance, then the manager has implicit incentives to affect the information. We examine the real incentive effects of soft information in a dynamic agency with limited commitment. When long-term contracts are renegotiated, the rewards for future performance inherent in long-term contracts allow the principal partial control over the implicit incentives. This is because the soft information affects the basis for contract renegotiation. With short-term contracts, the principal has no control over the basis for contract negotiation, and thus long-term contracts generally dominate short-term contracts. With long-term contracts, the principal's control over implicit incentives is characterized in terms of effective contracting on an implicit aggregation of the soft information that arises from predicting (forming expectations of) future performance. We provide sufficient conditions for soft information to have no real incentive effects. In general, implicit incentives not controllable by the principal include fixed effects, such as career concerns driven by labor markets external to the agency. When controllable incentives span the fixed effects of career concerns, the latter have no real effects with regard to total managerial incentives—they would optimally be the same with or without career concerns. Our analysis suggests empirical tests for estimating career concerns that should explicitly incorporate noncontractible information. 相似文献
105.
Judy Z. Stephenson 《The Economic history review》2020,73(2):409-430
This article provides new information and data on the work and pay of skilled and semi-skilled men on a large London construction project in the early 1700s. It offers firm-level evidence on the employment relation in the construction industry at the time and sheds some light on the number of days worked per year and per week, showing that employment was more irregular and seasonal than current estimates of income infer. The patterns are considered in the context of new debates about industriousness and economic growth. 相似文献
106.
目的探讨纤维蛋白胶(FG)粘合法联合神经生长因子(NGF)治疗周围神经损伤的临床疗效。方法选取我院2006年8月至2013年10月就诊的124例腓总神经损伤患者,随机均分为两组,对照组患者单纯使用缝合法,试验组患者在缝合法的基础上配合使用FG粘合法联合NGF治疗,随访6个月以上,分析两组患者的运动功能和患肢感觉疗效。结果试验组患者总有效率明显优于对照组,差异有统计学异议(P<0.05)。结论周围神经损伤的修复与再生过程中使用FG粘合法联合NGF治疗,可有效改善患者症状,安全性高,不良反应较少。 相似文献
107.
108.
Alexander G. Taylor 《The Economic history review》2019,72(2):433-458
This article addresses one under‐studied aspect of Charles I's finances during his Personal Rule: the licensing of tobacco retailers. While it was ultimately a failed project, the tobacco retail licence project was fiscally successful before the transformative events of the 1640s triggered its demise. The project enabled tobacco retail licensees to establish commercial outlets for the marketing of tobacco throughout England and Wales, and cooperation with pre‐existing officeholders contributed to the apprehension of unlicensed retailers. Ultimately, the geographic breadth of tobacco licences translated into much‐needed royal revenue which, when added to other projects and patents, contributed to the king's financial survival. The evidence presented here suggests that we may want to rethink some of our assumptions for how the process of state formation worked and that earlier seventeenth‐century ‘prototypes’ of taxation were more fiscally successful than previously recognized. 相似文献
109.
Robert C. Allen 《The Economic history review》2019,72(1):88-125
This article measures the size and incomes of six major social classes across the industrial revolution using social tables for England and Wales in 1688, 1759, 1798, 1846, and 1867. Lindert and Williamson famously revised these tables, and this article extends their work in three directions. First, servants are removed from middle‐ and upper‐class households in the tables of King, Massie, and Colquhoun and tallied separately. Second, estimates are made for the same tables of the number and incomes of women and children employed in the various occupations, and, third, incomes are broken down into rents, profits, and employment income. These extensions to the tables allow variables to be computed that can be checked against independent estimates as a validation exercise. The tables are retabulated in a standardized set of six social groups to highlight the changing structure of society across the industrial revolution. Gini coefficients are computed from the social tables to measure inequality. These measures confirm that Britain traversed a ‘Kuznets curve’ in this period. Changes in overall inequality are related to the changing fortunes of the major social classes. 相似文献
110.
Disclosure standards mandate the quantitative disclosure of hedging‐instrument‐related risks but not the disclosure of hedged‐item‐related risks. We examine how a match (mismatch) in formats, caused by making quantitative (qualitative) hedged item disclosures alongside quantitative hedging instrument disclosures, affects investors' integration of information from these two related disclosures. Our first experiment varies the hedged item disclosure format (quantitative or qualitative) and the portion of risk hedged (small or large). We find that when disclosure formats are mismatched, the less comparable nature of the two disclosures caused investors to neglect the offsetting relationship when assessing net risks. As a result, risk and investment judgments were influenced by the more prominent quantitative hedging instrument disclosures. Our second experiment finds that the use of a qualitative debiaser that clarifies the relationship between the two disclosures led to the integration of information and mitigated this effect. 相似文献