全文获取类型
收费全文 | 4598篇 |
免费 | 233篇 |
出版年
2023年 | 33篇 |
2020年 | 85篇 |
2019年 | 93篇 |
2018年 | 158篇 |
2017年 | 181篇 |
2016年 | 198篇 |
2015年 | 139篇 |
2014年 | 137篇 |
2013年 | 1170篇 |
2012年 | 127篇 |
2011年 | 171篇 |
2010年 | 140篇 |
2009年 | 143篇 |
2008年 | 127篇 |
2007年 | 115篇 |
2006年 | 102篇 |
2005年 | 62篇 |
2004年 | 72篇 |
2003年 | 53篇 |
2002年 | 60篇 |
2001年 | 65篇 |
2000年 | 68篇 |
1999年 | 55篇 |
1998年 | 50篇 |
1997年 | 55篇 |
1996年 | 37篇 |
1995年 | 44篇 |
1994年 | 37篇 |
1993年 | 44篇 |
1992年 | 37篇 |
1991年 | 42篇 |
1990年 | 34篇 |
1989年 | 40篇 |
1988年 | 27篇 |
1987年 | 40篇 |
1986年 | 31篇 |
1985年 | 49篇 |
1984年 | 50篇 |
1983年 | 42篇 |
1982年 | 36篇 |
1981年 | 36篇 |
1980年 | 45篇 |
1979年 | 37篇 |
1978年 | 41篇 |
1977年 | 43篇 |
1976年 | 51篇 |
1975年 | 32篇 |
1974年 | 31篇 |
1973年 | 27篇 |
1972年 | 21篇 |
排序方式: 共有4831条查询结果,搜索用时 31 毫秒
11.
"A model of private local labor demand and interjurisdictional migration is presented and estimated using data from Swedish counties and municipalities for 1979-84. Our goal is to compare the effects on local labor markets of distinctive public-sector programs with those of traditional market variables. We find that local income taxes and tax-equalization grants have important effects on local labor markets; regional development policy measures and geographical-mobility subsidies do not. Thus, recent efforts scaling back some of these programs may not materially alter the regional economy's performance. Wages and other traditional market variables are also often found to influence significantly local labor markets." 相似文献
12.
ABSTRACT. In this paper the impact of spatial and nonspatial variables on the innovation potential and innovativeness of (small) industrial firms in The Netherlands will be analyzed. Innovation potential and innovativeness will be conceived as latent variables which will be measured by a partial least squares approach. The variables reflecting innovation potential are notably input variables such as internal and external R&D, while innovativeness will be based on output indicators such as the number of product and process innovations. The regional dimension enters our analysis essentially at two levels. First, we will investigate whether more innovative firms are to some extent spatially biased (i.e., on the basis of intrafirm characteristics). Secondly, we will analyze the relevance of an indigenous regional impact, per se. In other words, we will examine whether firms with an equal innovation capacity will differ in actual (i.e., realized) innovativeness as a consequence of different regional conditions. For the first issue, our results indicate that not all regions are equally well-endowed with potentially innovative (small) firms. Our analysis even demonstrates that these firms are underrepresented in regions which are generally considered to offer the most favorable production environment. After compensating for these differences in the composition of the regional set of firms, we demonstrate that an indigenous regional impact per se cannot be identified in The Netherlands. 相似文献
13.
Jan Oosterhaven 《Journal of regional science》1989,29(3):459-465
ABSTRACT. In this reply, I argue that the production function proposed by Gruver provides a theoretical foundation for the supply model only in a most trivial case. He proposes a more general alternative which is, however, still very implausible. Furthermore, against Rose and Allison, I argue that small input-coefficient changes provide an insufficient excuse for using the supply model for impact studies, and I show that employment estimates may be quite different depending on the approach used. 相似文献
14.
15.
16.
17.
18.
19.
20.