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   1006篇
  免费   63篇
管理学   126篇
民族学   11篇
人口学   76篇
丛书文集   5篇
理论方法论   147篇
综合类   7篇
社会学   594篇
统计学   103篇
  2023年   8篇
  2022年   8篇
  2021年   16篇
  2020年   37篇
  2019年   33篇
  2018年   34篇
  2017年   66篇
  2016年   41篇
  2015年   33篇
  2014年   44篇
  2013年   151篇
  2012年   33篇
  2011年   42篇
  2010年   23篇
  2009年   37篇
  2008年   28篇
  2007年   33篇
  2006年   25篇
  2005年   29篇
  2004年   30篇
  2003年   27篇
  2002年   35篇
  2001年   22篇
  2000年   19篇
  1999年   25篇
  1998年   16篇
  1997年   21篇
  1996年   9篇
  1995年   11篇
  1994年   9篇
  1993年   15篇
  1992年   17篇
  1991年   5篇
  1990年   12篇
  1989年   6篇
  1988年   3篇
  1987年   5篇
  1986年   5篇
  1985年   5篇
  1984年   7篇
  1983年   4篇
  1982年   6篇
  1980年   3篇
  1979年   5篇
  1978年   5篇
  1975年   3篇
  1974年   5篇
  1973年   2篇
  1971年   3篇
  1970年   3篇
排序方式: 共有1069条查询结果,搜索用时 15 毫秒
241.
Return migration is key to community recovery from many disasters. Japanese governments have conducted radiation decontamination efforts in the Exclusion Zone designated after the 2011 Fukushima nuclear disaster in order to encourage this outcome. Little is known, however, about the factors that influence post-disaster migrants to return, and, if people are relatively unresponsive to decontamination, then the costs of promoting recovery may exceed the benefits. We exploit a unique survey of Fukushima evacuees to determine the factors that influence their decision to return after a disaster. Location-specific capital characteristics, such as housing tenure and the extent of property damage, are estimated to be strong factors. The radiation dose rate of the home location is found to be a statistically significant factor for intent to return, but its effect is small. We also found that households with various other characteristics were noncommittal about the return option and likely to defer their decisions, which implies that “return” and “not-return” are asymmetric. Our simulation analysis found that the number of returnees encouraged by this decontamination was 12,882, less than 8% of the total evacuees, while the decontamination cost per returnee was 3.36 million USD. This result implies that the government could have improved the well-being of evacuees at a lower cost by policies other than decontamination.  相似文献   
242.
243.
Objective: To assess the safety of meningococcal group B (MenB)-4C vaccine. Participants: Undergraduates, dormitory residents, and persons with high-risk medical conditions received the MenB-4C vaccine two-dose series during mass vaccination clinics from 12/2013 through 11/2014. Methods: Adverse events (AEs) were identified by 15 minutes of observation postvaccination, spontaneous reports, surveys, and hospital surveillance. Causality was assessed for serious adverse events (SAEs). Results: 16,974 persons received 31,313 MenB-4C doses. The incidence of syncope during the 15-minutes post-dose 1 was 0.88/1000 persons. 2% of participants spontaneously reported an AE (most common were arm pain and fever). 3 SAEs were suspected of being caused by the vaccine, including one case of anaphylaxis. Conclusions: Most AEs reported were nonserious and consistent with previous clinical trial findings. Measures to prevent injury from syncope and to treat anaphylaxis should be available wherever vaccines are administered. Our safety evaluation supports the use of MenB-4C in response to outbreaks.  相似文献   
244.
245.
This article summarizes 8 presentations from Group 8 on the theme “Training of Researchers and Practitioners,” which were part of the 2007 joint symposium of the International Association for Educational and Vocational Guidance, Society for Vocational Psychology, and National Career Development Association held in Padua, Italy. Three themes representing challenges for the profession emerged from the presentations: (a) the need for public policies addressing career development, (b) the need for greater competency standardization, and (c) the need to create innovative training programs. Discussion group participants presented creative strategies for addressing these challenges.  相似文献   
246.
This paper discusses a methodology used for a qualitative cost–benefit evaluation of a complex, emergent program. Complex, emergent programs, where implementation varies considerably over time and across sites to respond to local needs and opportunities, present challenges to conventional methods for cost–benefit evaluation. Such programs are characterized by: ill-defined boundaries of what constitutes the intervention, and hence the resources used; non-standardized procedures; differing short-term outcomes across projects, even within the same long-term goals; and outcomes that are the result of multiple factors and co-production, making counter-factual approaches to attribution inadequate and the use of standardized outcome measures problematic. The paper discusses the advantages and limitations of this method and its implications for cost–benefit evaluation of complex programs.  相似文献   
247.
The World Bank's newest country‐systems policy, adopted in 2008, allows borrowers to use their national systems to conduct procurement and manage finances for Bank‐funded projects. In principle, it will incentivise institutional reform, increase local ownership, and facilitate donor harmonisation. In practice, its content and the handling of stakeholder input seem to indicate that the Bank's dominant desire has been to preserve its market share. This article demonstrates (i) how deficiencies in the policy may reverse the Bank's work on governance and undercut aid efficiency, and (ii) how its handling of public consultations on the policy ignored the Bank's best practices. It concludes with steps for improving the policy, including re‐opening dialogue with key stakeholders.  相似文献   
248.
249.
Global experience with pro‐poor growth and empirical work spanning India, Malawi and Zimbabwe demonstrates the importance of agricultural growth for poverty reduction in poor rural areas, while also pointing to the need for complementary non‐farm sector growth. Theoretical arguments, historical evidence and livelihoods modelling in poor medium‐potential rural economies suggest that, contrary to thinking dominating much of current development policy, subsidies to relieve critical seasonal credit and cash restraints and reduce market and input supply uncertainties need to help in ‘kick‐starting’ agricultural markets if increased smallholder productivity in food‐grains is to drive rural non‐farm growth. Establishing the base conditions for these to work, designing and implementing them to be effective, and then phasing them out are major challenges facing policymakers.  相似文献   
250.
In environmental risk management, there are often interests in maximizing public health benefits (efficiency) and addressing inequality in the distribution of health outcomes. However, both dimensions are not generally considered within a single analytical framework. In this study, we estimate both total population health benefits and changes in quantitative indicators of health inequality for a number of alternative spatial distributions of diesel particulate filter retrofits across half of an urban bus fleet in Boston, Massachusetts. We focus on the impact of emissions controls on primary fine particulate matter (PM2.5) emissions, modeling the effect on PM2.5 concentrations and premature mortality. Given spatial heterogeneity in baseline mortality rates, we apply the Atkinson index and other inequality indicators to quantify changes in the distribution of mortality risk. Across the different spatial distributions of control strategies, the public health benefits varied by more than a factor of two, related to factors such as mileage driven per day, population density near roadways, and baseline mortality rates in exposed populations. Changes in health inequality indicators varied across control strategies, with the subset of optimal strategies considering both efficiency and equality generally robust across different parametric assumptions and inequality indicators. Our analysis demonstrates the viability of formal analytical approaches to jointly address both efficiency and equality in risk assessment, providing a tool for decisionmakers who wish to consider both issues.  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