全文获取类型
收费全文 | 9645篇 |
免费 | 216篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 1739篇 |
工业经济 | 807篇 |
计划管理 | 1680篇 |
经济学 | 2153篇 |
综合类 | 220篇 |
运输经济 | 44篇 |
旅游经济 | 135篇 |
贸易经济 | 1527篇 |
农业经济 | 395篇 |
经济概况 | 1131篇 |
信息产业经济 | 1篇 |
邮电经济 | 30篇 |
出版年
2020年 | 111篇 |
2019年 | 139篇 |
2018年 | 180篇 |
2017年 | 212篇 |
2016年 | 194篇 |
2015年 | 138篇 |
2014年 | 189篇 |
2013年 | 874篇 |
2012年 | 271篇 |
2011年 | 277篇 |
2010年 | 256篇 |
2009年 | 302篇 |
2008年 | 274篇 |
2007年 | 255篇 |
2006年 | 205篇 |
2005年 | 181篇 |
2004年 | 185篇 |
2003年 | 191篇 |
2002年 | 150篇 |
2001年 | 201篇 |
2000年 | 207篇 |
1999年 | 174篇 |
1998年 | 170篇 |
1997年 | 202篇 |
1996年 | 175篇 |
1995年 | 179篇 |
1994年 | 165篇 |
1993年 | 168篇 |
1992年 | 195篇 |
1991年 | 189篇 |
1990年 | 150篇 |
1989年 | 152篇 |
1988年 | 123篇 |
1987年 | 120篇 |
1986年 | 126篇 |
1985年 | 178篇 |
1984年 | 155篇 |
1983年 | 171篇 |
1982年 | 137篇 |
1981年 | 168篇 |
1980年 | 141篇 |
1979年 | 161篇 |
1978年 | 134篇 |
1977年 | 119篇 |
1976年 | 125篇 |
1975年 | 106篇 |
1974年 | 101篇 |
1973年 | 85篇 |
1972年 | 64篇 |
1971年 | 58篇 |
排序方式: 共有9862条查询结果,搜索用时 0 毫秒
21.
B. Gerritse 《Statistica Neerlandica》1996,50(2):281-294
We introduce a new method for proving large-deviation principles (LDPs). This method amounts to "mixing" a collection of LDPs with a sequence of probability measures that obeys itself an LDP. As an illustration, we construct from empirical measures a sequence of capacity-valued maps that can be considered as an indexed collection of LDPs. The index 1 coincides with Sanov's theorem. By taking a Poisson mixture we establish a new connection with Cramér's theorem. 相似文献
22.
An algorithm is described to compute equilibria of the general economic model with incomplete asset markets, that is, of GEI. The algorithm is based on the existence of a route of zeros of a homotopy whose domain includes the price simplex and a Grassmann Manifold. This route is followed, in effect, by localizing and following diffeomorphic pieces in Euclidean space, and by relocalizing as is necessary. 相似文献
23.
24.
25.
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
26.
27.
28.
29.
30.
Strategic partnerships are commonplace in today's global economy. Effective use of partnerships are viewed increasingly as an important issue facing small, growth-oriented firms. A key debate is how small firms should manage supplier partnerships. Contrasting the debate about the extent to which small firms are inertial versus adaptive, the impact of growth on value chain partnerships with suppliers was investigated. Data collected from 91 pharmaceutical-related firms is used to test the proposition that firm growth is related positively to maintaining or to expanding relationships with suppliers, not to terminating partnerships. The paper further posits that this relationship between firm growth and the amount purchased from a supplier is moderated by the perceived effectiveness of the value-chain partnerships such that when effectiveness is higher, the relationship between sales growth and the amount purchased from a value-chain partner is stronger. The propositions, which are tested with regression analysis, are supported partially. 相似文献