全文获取类型
收费全文 | 37189篇 |
免费 | 4841篇 |
国内免费 | 770篇 |
专业分类
财政金融 | 2281篇 |
工业经济 | 2620篇 |
计划管理 | 7713篇 |
经济学 | 8037篇 |
综合类 | 6369篇 |
运输经济 | 505篇 |
旅游经济 | 340篇 |
贸易经济 | 6651篇 |
农业经济 | 4755篇 |
经济概况 | 3512篇 |
邮电经济 | 17篇 |
出版年
2024年 | 199篇 |
2023年 | 492篇 |
2022年 | 847篇 |
2021年 | 1449篇 |
2020年 | 1031篇 |
2019年 | 1130篇 |
2018年 | 941篇 |
2017年 | 1182篇 |
2016年 | 1021篇 |
2015年 | 1721篇 |
2014年 | 2428篇 |
2013年 | 2666篇 |
2012年 | 3274篇 |
2011年 | 3158篇 |
2010年 | 3278篇 |
2009年 | 3117篇 |
2008年 | 2846篇 |
2007年 | 2860篇 |
2006年 | 2623篇 |
2005年 | 2152篇 |
2004年 | 1210篇 |
2003年 | 801篇 |
2002年 | 594篇 |
2001年 | 535篇 |
2000年 | 341篇 |
1999年 | 116篇 |
1998年 | 78篇 |
1997年 | 71篇 |
1996年 | 60篇 |
1995年 | 39篇 |
1994年 | 44篇 |
1993年 | 51篇 |
1992年 | 67篇 |
1991年 | 92篇 |
1990年 | 31篇 |
1989年 | 33篇 |
1988年 | 17篇 |
1987年 | 10篇 |
1986年 | 9篇 |
1985年 | 19篇 |
1984年 | 9篇 |
1983年 | 16篇 |
1982年 | 20篇 |
1981年 | 16篇 |
1979年 | 9篇 |
1978年 | 8篇 |
1973年 | 7篇 |
1972年 | 7篇 |
1969年 | 9篇 |
1963年 | 9篇 |
排序方式: 共有10000条查询结果,搜索用时 250 毫秒
21.
自由主义是西方资本主义的代名词,但在德国,有着追求大民族理想的历史传统,自由主义在与浪漫主义的冲突和民族主义的强大势力的威慑下缓慢发展,结果走向了法西斯主义。反思历史可以警惕极端民族主义思潮;同时在全球化的背景下也应避免走向削弱民族意识乃至丧失民族意识的极端思潮。 相似文献
22.
23.
This paper analyzes the issue costs and initial pricing of bonds in the international market. In particular, we investigate the determinants of three components of issue costs: underwriter fee, underwriter spread (the difference between the offering price and the guaranteed price to the issuer), and underpricing (the difference between the market price and the offering price). Total underwriter compensation increases with the bonds' credit risk and maturity, but it is insignificantly related to issue size. Interestingly, underwriters appear to price some issue characteristics directly (by adjusting the fee) and other characteristics indirectly (by setting the guaranteed price). The two compensation components (fee and spread) are negatively related to each other. We provide evidence that this trade-off is consistent with income tax considerations, as well as with two-tier pricing by underwriters. We find no evidence of underpricing. 相似文献
24.
Using data for a sample of Malaysian stocks that are traded in both Malaysia and Singapore, we show that the turnover rate (trading volume relative to shares held) is significantly higher in the foreign market than in the domestic market. We also find that ownership of cross–listed shares by foreign investors is not motivated by diversification benefits. Instead, we find that the proportion of a firm's shares held in Singapore is directly related to the firm's level of systematic risk. 相似文献
25.
In rational, efficiently functioning and complete markets, returns on derivative and underlying securities should be perfectly contemporaneously correlated. Due to market imperfections, one of these markets may reflect information faster. The use of high-frequency data and the choice for a small unit time interval to measure these lead-lag relations comes at the cost of some or many missing observations, causing traditional estimators to either under- or overestimate covariances and correlations. We use a new estimator to estimate lead-lag relationships between the cash AEX index, options and futures. We find that futures returns lead both options and cash index returns by approximately 10 minutes. The relationship between options and the cash market is not completely unidirectional. 相似文献
26.
Programme Evaluation with Unobserved Heterogeneity and Selective Implementation: The Mexican PROGRESA Impact on Child Nutrition 总被引:1,自引:0,他引:1
This paper considers the impact of Programa de Educación, Salud y Alimentación ( PROGRESA ), a large Mexican rural anti-poverty programme that had an evaluation sample in which overall treatment was randomly assigned to some communities but not others, on child nutrition. When we examine the impact of PROGRESA based on the presumption of randomized allocations, we find that PROGRESA had no or even a negative impact on child nutrition. However, not all children designated to receive nutritional supplements actually did so. Our preferred estimates – child fixed-effects estimates that control for unobserved heterogeneity that is correlated with access to the supplement – indicate a significantly positive and fairly substantial programme effect of the nutritional supplements on children 12–36 months. They imply an increase of about a sixth in mean growth per year for these children and a lower probability of stunting. Effects are somewhat larger for children from poorer communities but whose mothers are functionally literate. The long-term consequences of these improvements are non-trivial; its impact working through adult height alone could result in a 2.9% increase in lifetime earnings. 相似文献
27.
28.
以旅游消费驱动区域旅游竞合--以长江三角洲构建无障碍旅游区为例 总被引:14,自引:0,他引:14
以长江三角洲构建中国首个无障碍旅游区为例,提出旅游消费再生性、强关联性、跨区域性等特性是促成旅游竞合的天然机理,论述了作为市场力量的旅游消费是催生区域旅游竞合机制,促成旅游企业竞合的重要推动力,最后提出构建旅游消费驱动下的长三角区域旅游竞合的对策。 相似文献
29.
我国保险条款晦涩难懂的问题已经在很大程度上制约了我国保险业的健康发展,本文详细剖析了我国保险条款在文字、内容、形式等方面存在的问题,并从我国实际情况出发,指出了当前我国进行保险条款通俗化的迫切性,提出了我国保险条款通俗化的思路构想. 相似文献
30.
探讨了葡萄球菌肠毒素B(SEB)对动物移植性肿瘤的抑制作用。以小鼠移植性肿瘤肝癌(Heps)、L2网织细胞瘤和肉瘤180(S180)为模型,环磷酰胺为阳性对照组,生理盐水为阴性对照组,观察不同剂量(5、10和20ng·Kg-1·d-1)SEB的抗肿瘤作用。不同剂量的SEB对小鼠肝癌(Heps)有明显抑制作用,抑瘤率分别为44.6%、46.7%和51.8%(P值均<0.05),对小鼠L2网织细胞瘤也有一定的抑制作用,抑瘤率分别为17.4%、44.7%(P<0.05)和44.1%(P<0.05)。SEB对小鼠S180的抑制作用不显著。结论是葡萄球菌肠毒素B(SEB)具有抗肿瘤效应,可作为一种有前途的抗肿瘤制剂进行研究。 相似文献