全文获取类型
收费全文 | 139191篇 |
免费 | 3233篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 26083篇 |
工业经济 | 11640篇 |
计划管理 | 22262篇 |
经济学 | 30070篇 |
综合类 | 1491篇 |
运输经济 | 965篇 |
旅游经济 | 2500篇 |
贸易经济 | 23823篇 |
农业经济 | 6171篇 |
经济概况 | 17125篇 |
信息产业经济 | 7篇 |
邮电经济 | 288篇 |
出版年
2021年 | 842篇 |
2020年 | 1632篇 |
2019年 | 2379篇 |
2018年 | 2403篇 |
2017年 | 2546篇 |
2016年 | 2717篇 |
2015年 | 2104篇 |
2014年 | 3411篇 |
2013年 | 15343篇 |
2012年 | 4240篇 |
2011年 | 4248篇 |
2010年 | 3760篇 |
2009年 | 4376篇 |
2008年 | 3988篇 |
2007年 | 3346篇 |
2006年 | 3633篇 |
2005年 | 3634篇 |
2004年 | 3217篇 |
2003年 | 2976篇 |
2002年 | 2929篇 |
2001年 | 2722篇 |
2000年 | 2644篇 |
1999年 | 2501篇 |
1998年 | 2384篇 |
1997年 | 2388篇 |
1996年 | 2272篇 |
1995年 | 2070篇 |
1994年 | 2098篇 |
1993年 | 2069篇 |
1992年 | 2113篇 |
1991年 | 2025篇 |
1990年 | 1891篇 |
1989年 | 1717篇 |
1988年 | 1655篇 |
1987年 | 1660篇 |
1986年 | 1745篇 |
1985年 | 2510篇 |
1984年 | 2401篇 |
1983年 | 2204篇 |
1982年 | 2062篇 |
1981年 | 1978篇 |
1980年 | 1950篇 |
1979年 | 1879篇 |
1978年 | 1681篇 |
1977年 | 1640篇 |
1976年 | 1395篇 |
1975年 | 1298篇 |
1974年 | 1193篇 |
1973年 | 1191篇 |
1972年 | 903篇 |
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
221.
In this paper we analyze the properties of price equilibria in a duopoly market where firms sell vertically differentiated products, consumers being uncertain about which firm sells which quality. Both existence and properties of price equilibria are characterized by the beliefs of the consumers' population about the distribution of quality between firms. 相似文献
222.
223.
224.
The purpose of this study was to find out if significant differences exist in patterns of expenditures between elderly and non-elderly consumers, taking poverty status into account. Cluster analysis was used to identify expenditure patterns. Four different expenditure patterns were found. Elderly middle-income and affluent households were more likely to belong to service-using cluster than non-elderly poor households. Nonelderly households were more likely to belong to shelter-dominated cluster than elderly households. Poor households were more likely to belong to homebound cluster, while non-poor households were more likely to belong to car-centred cluster. 相似文献
225.
226.
The price movements of certain assets can be modeled by stochastic processes that combine continuous diffusion with discrete jumps. This paper compares values of options on assets with no jumps, jumps of fixed size, and jumps drawn from a lognormal distribution. It is shown that not only the magnitude but also the direction of the mispricing of the Black-Scholes model relative to jump models can vary with the distribution family of the jump component. This paper also discusses a methodology for the numerical valuation, via a backward induction algorithm, of American options on a jump-diffusion asset whose early exercise may be profitable. These cannot, in general, be accurately priced using analytic models. The procedure has the further advantage of being easily adaptable to nonanalytic, empirical distributions of period returns and to nonstationarity in the underlying diffusion process. 相似文献
227.
228.
229.
230.
Christopher M. Dent 《Intereconomics》1997,32(1):7-13
Present economic linkages between the European Union and East Asia are relatively underdeveloped despite the fact that a number of EU member states have deep historical associations within the region. It is imperative that EU business engages itself more intensively in East Asia if Europe is not to become marginalised in an emergent “Pacific century”. *** DIRECT SUPPORT *** A02GP109 00002 相似文献