首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4744篇
  免费   146篇
各国政治   150篇
工人农民   215篇
世界政治   312篇
外交国际关系   179篇
法律   3152篇
中国政治   24篇
政治理论   835篇
综合类   23篇
  2023年   37篇
  2021年   26篇
  2020年   57篇
  2019年   76篇
  2018年   104篇
  2017年   98篇
  2016年   115篇
  2015年   70篇
  2014年   92篇
  2013年   413篇
  2012年   114篇
  2011年   136篇
  2010年   94篇
  2009年   120篇
  2008年   120篇
  2007年   118篇
  2006年   124篇
  2005年   84篇
  2004年   102篇
  2003年   109篇
  2002年   87篇
  2001年   210篇
  2000年   210篇
  1999年   152篇
  1998年   63篇
  1997年   63篇
  1996年   54篇
  1995年   54篇
  1994年   59篇
  1993年   52篇
  1992年   119篇
  1991年   106篇
  1990年   132篇
  1989年   121篇
  1988年   136篇
  1987年   129篇
  1986年   100篇
  1985年   106篇
  1984年   80篇
  1983年   71篇
  1982年   52篇
  1981年   47篇
  1980年   40篇
  1979年   50篇
  1978年   36篇
  1976年   30篇
  1975年   28篇
  1974年   39篇
  1973年   28篇
  1970年   27篇
排序方式: 共有4890条查询结果,搜索用时 15 毫秒
901.
Abstract

In his 2005 article “Valuing the Suburbs: Why Some ‘Improvements’ Lower Home Prices,” Robert E. Lang proposes an explanation of why improvements to a home may either add to or detract from its value. He suggests a dual housing market: “one for conventional low‐density suburbs, and one for cities and denser suburbs” (8). The former values features implying a natural or less intense use, and the latter values features adding “intensity or utility to a property” (8).

This article reinterprets Lang's explanation as an example of interaction (something having a different effect under one condition than it does under another) arising via summation followed by a nonlinear function of the result. An alternative explanation in terms of the fit between characteristics of a home and its location is also noted.  相似文献   
902.
903.
904.

In China industrial clusters consisting of small and medium enterprises have been proliferating in areas where private sectors have successfully developed. This study inquires into the process of forming a new industrial cluster and the roles of local and distant urban traders in the garment industry in China. We found that the local marketplace, where enterprise managers can easily purchase materials from and sell products to local traders, plays a critical role in stimulating the entry of new enterprises in the early stage of cluster development. As a cluster develops, however, entrepreneurial ability in producing high-quality products and marketing them to urban traders plays a more significant role.  相似文献   
905.

The association between improving economic conditions and declining growth of population has led economists and demographers to hypothesise a direct relationship between indicators of economic development and fertility rates. Using recent National Family Health Survey data and the 1991 Census to explore factors contributing to fertility rates in India, we found that economic variables explain 70 per cent of the interstate variations in India's fertility rates. However, several non-economic variables explain an even greater proportion, for example, indicators of female autonomy explain 84 per cent of the variations. Our analysis demonstrates that to successfully explain Indian fertility rates, models must rely heavily on non-economic variables.  相似文献   
906.
907.
Abstract

For many years Jane Hamilton-Merritt has carried out a publicity campaign in support of Vang Pao and the so-called “Lao resistance,” while condemning the government of the Lao People's Democratic Republic (Lao PDR) and anyone who challenges her own views. Hamilton-Merritt has demonstrated great effectiveness in marshaling the mainstream media, reputable public figures, and otherwise respected institutions as the channels or even mouthpieces for her campaign. The publication of Tragic Mountains highlights her ongoing efforts to find acceptance for her fanciful vision of the recent history of Laos (and the United States). Her success in this campaign has been possible only because few in her audience know the facts behind her distorted misrepresentations. In this book, Hamilton-Merritt constructs a fantastical account of “the Hmong, the Americans, and the secret wars for Laos” that bears little relation to the truth of the events and personalities she discusses.  相似文献   
908.
Past estimates of poverty in Bangladesh based on the food energy intake method found decreasing poverty over time and similar poverty in urban and rural areas. Using the cost of basic needs method, we find increasing poverty for 1984–92 and higher poverty in rural than urban areas. Examples of lack of consistency in past estimates are highlighted. A method is introduced to assess the gap narrowing and re‐ranking impacts on poverty measures of changes in poverty lines. The article also estimates the marginal impact of household characteristics such as household size, education, occupation and land ownership on the probability of being poor.  相似文献   
909.
In the early years of its introduction, the HYV technology was widely regarded as a technical breakthrough that would bring about rapid agrarian progress and a revolutionary improvement in the standard of living of the farm population. Three decades later the promise of the new technology remains unfulfilled. This article argues that the adoption of the HYV technology in the agriculture of Bangladesh was determined mainly by an acute demographic pressure. Since the non‐agricultural sectors did not expand sufficiently rapidly, there was a tremendous pressure on agriculture to accommodate the additional workforce. The imperative to employ a larger workforce and feed a rising population forced the farmers to adopt the labour‐intensive, land‐augmenting HYV technology. The welfare of the farmers did not show any secular increase with the switch to the new technology.  相似文献   
910.
Abstract

This paper analyses work, childcare, and earnings of mothers in the slums of Guatemala City and Accra. Similar factors affect decisions to work and to use formal daycare, but the importance of childcare varies with the role of the formal labour sector. In Guatemala, where formal sector work is important, higher prices for informal care increase formal daycare use. However, daycare prices and proximity to daycare centers do not significantly affect earnings in Guatemala City and Accra, respectively. Providing formal daycare may be more important to mothers' decision to work in cities where formal sector work dominates.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号