全文获取类型
收费全文 | 803篇 |
免费 | 34篇 |
出版年
2023年 | 12篇 |
2021年 | 3篇 |
2020年 | 8篇 |
2019年 | 17篇 |
2018年 | 26篇 |
2017年 | 44篇 |
2016年 | 38篇 |
2015年 | 27篇 |
2014年 | 24篇 |
2013年 | 239篇 |
2012年 | 27篇 |
2011年 | 20篇 |
2010年 | 15篇 |
2009年 | 24篇 |
2008年 | 20篇 |
2007年 | 31篇 |
2006年 | 14篇 |
2005年 | 12篇 |
2004年 | 14篇 |
2003年 | 12篇 |
2002年 | 24篇 |
2001年 | 17篇 |
2000年 | 9篇 |
1999年 | 14篇 |
1998年 | 15篇 |
1997年 | 9篇 |
1996年 | 9篇 |
1995年 | 8篇 |
1994年 | 6篇 |
1993年 | 3篇 |
1992年 | 6篇 |
1991年 | 3篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 7篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1983年 | 4篇 |
1982年 | 5篇 |
1981年 | 3篇 |
1980年 | 5篇 |
1979年 | 8篇 |
1978年 | 2篇 |
1977年 | 7篇 |
1976年 | 3篇 |
1975年 | 6篇 |
1974年 | 4篇 |
1973年 | 5篇 |
1972年 | 3篇 |
1970年 | 2篇 |
排序方式: 共有837条查询结果,搜索用时 15 毫秒
151.
Strategic Environmental Planning and Uncertainty: A Cross-National Comparison of Green Plans in Industrialized Countries 总被引:1,自引:0,他引:1
Uncertainty is a distinct feature of environmental policy and environmental issues. This article explores the potential of strategic and comprehensive environmental planning for dealing with these uncertainties. First, four types of uncertainty and their specific impacts on environmental policy are distinguished. Strategic environmental planning could be a promising approach for dealing with these uncertainties. Based on an empirical analysis of national environmental policy plans and sustainability strategies in Organization for Economic Cooperation and Development countries, this article comes to the conclusion that although only few of the existing green plans fully explore the theoretical potential of this new approach to environmental policymaking, it has proven an effective mechanism to deal with and reduce at least some of the uncertainties with which environmental policymakers are confronted. The greatest potential of strategic planning lies in increasing the political system's capacity to deal with those problems of long-term environmental degradation, which in spite of the past successes of environmental protection remain largely unsolved. 相似文献
152.
There is currently considerable interest in and debate overthe impact of increasing European economic and monetary integration(EMU) on the regions of the EU. Opinion is sharply divided overwhether EMU is leading to regional economic convergence or regionaleconomic divergence. This paper examines the theoretical argumentsand empirical evidence for these opposing views, and presentssome additional analysis of patterns of regional productivitytrends and employment growth over the period 197598.The picture that emerges is a complex one: whilst worker productivityshows only very weak convergence across the EU regions (a processwhich halted altogether after the mid-1980s), regional employmentgrowth has been sharply divergent. Although there is littlesupport for the claim that EMU will lead to regional convergence,these findings suggest that until much more detailed investigationof the specific impacts on particular types of region is undertaken,the regional implications of EMU will remain a contentious issue. 相似文献
153.
In recent years it has been pointed out that regional unemployment disparities are much more entrenched across member states of the European Union (E.U.) than they are in the U.S. A 'conventional wisdom' has emerged to the effect that this difference is due in part to the greater degree of wage rigidity in E.U. regions. In this paper we explore this issue by estimating short run and long run real wage (in)flexibility for the regions in five core E.U. countries (Germany, France, Italy, the United Kingdom, and the Netherlands) and for the U.S. states for the period 1976–1994. We find that real wage (in)flexibility varies across regions both in the E.U. and the U.S., but that, on average, regional wages are no less flexible in E.U. core regions than in U.S. states. The paper also examines some of the possible correlates ofregional variations in wage (in)flexibility. 相似文献
154.
155.
156.
157.
158.
159.
160.
Martin D 《Transactions (Institute of British Geographers : 1965)》1992,17(3):350-357
"The decade between the 1981 and 1991 UK Censuses of Population has seen an enormous increase in the use of the postcode system for locational referencing. To date, no direct means have existed for linking postcoded data to census geography at the most detailed level, but the production of a new ED/postcode directory promises to offer a range of new opportunities for postcode applications following the release of the 1991 Census data. This paper reviews the characteristics of the postcode system, describes the new directory, and examines the methods which will be available for linking the Census and postcodes post-1991." 相似文献