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   9048篇
  免费   274篇
管理学   1255篇
民族学   40篇
人才学   1篇
人口学   838篇
丛书文集   44篇
理论方法论   836篇
综合类   290篇
社会学   4090篇
统计学   1928篇
  2023年   51篇
  2022年   43篇
  2021年   62篇
  2020年   117篇
  2019年   148篇
  2018年   204篇
  2017年   308篇
  2016年   247篇
  2015年   173篇
  2014年   212篇
  2013年   1549篇
  2012年   350篇
  2011年   275篇
  2010年   218篇
  2009年   196篇
  2008年   244篇
  2007年   228篇
  2006年   191篇
  2005年   240篇
  2004年   221篇
  2003年   253篇
  2002年   268篇
  2001年   236篇
  2000年   210篇
  1999年   207篇
  1998年   159篇
  1997年   130篇
  1996年   143篇
  1995年   119篇
  1994年   106篇
  1993年   115篇
  1992年   136篇
  1991年   129篇
  1990年   117篇
  1989年   113篇
  1988年   119篇
  1987年   122篇
  1986年   110篇
  1985年   128篇
  1984年   106篇
  1983年   115篇
  1982年   82篇
  1981年   77篇
  1980年   75篇
  1979年   80篇
  1978年   77篇
  1977年   58篇
  1976年   48篇
  1975年   62篇
  1974年   52篇
排序方式: 共有9322条查询结果,搜索用时 734 毫秒
731.
732.
This article describes the education quality control systems (for mathematics) used by those countries that performed best on the Third International Mathematics and Science Study (TIMSS). Enforced quality control measures are defined as "decision points"--where adherence to the curriculum and instruction system can be reinforced. Most decision points involve stakes for the student, teacher, or school. They involve potential consequences for failure to adhere to the system and to follow the program at a reasonable pace. Generally, countries with more decision points perform better on the TIMSS. When the number of decision points and TIMSS test scores are adjusted for country wealth, the relationship between the degree of (enforced) quality control and student achievement appears to be positive and exponential. CONCLUSION: The more (enforced) quality control measures employed in an education system, the greater is students' academic achievement.  相似文献   
733.
This Issue Brief provides summary data on the insured and uninsured populations in the nation and in each state. It discusses the characteristics most closely related to an individual's health insurance status. Based on EBRI estimates from the March 2001 Current Population Survey (CPS), it represents 2000 data--the most recent available. Between 1999 and 2000, the percentage of Americans with health insurance increased: 84.1 percent of nonelderly Americans were covered by some form of health insurance in 2000, up from 83.8 percent in 1999. The percentage of nonelderly Americans without health insurance coverage declined from 16.2 percent in 1999 to 15.9 percent in 2000, continuing a trend that started between 1998 and 1999. The main reason for the decline in the number of uninsured Americans was the strong economy and low unemployment. Between 1999 and 2000, the percentage of nonelderly Americans covered by employment-based health insurance increased from 66.6 percent to 67.3 percent, continuing a longer-term trend that started between 1993 and 1994. In 2000, 34.3 million Americans received health insurance from public programs, and an additional 16.1 million purchased it directly from an insurer. More than 25 million Americans participated in Medicaid or the State Children's Health Insurance Program, and 6.1 million received their health insurance through the Tricare and CHAMPVA programs and other government programs designed to provide coverage for retired military members and their families. Even though the number and percentage of uninsured declined substantially between 1998 and 2000, more than 38 million Americans remain uninsured. While an increasing percentage of Americans were being covered by employment-based health plans, this trend may not continue because of the combined re-emergence of health care cost inflation and the weak economy. As long as the economy is strong and unemployment is low, employment-based health insurance coverage will expand and the uninsured will decline gradually. However, the combination of the current weak economy and the rising cost of providing health benefits will likely result in more Americans without health insurance coverage. Should the uninsured remain unchanged and continue to represent 15.9 percent of the nonelderly population, 40 million would be uninsured by 2005. If the uninsured represented 25 percent of the population, 63 million would be uninsured in 2005 and 65 million nonelderly Americans would be uninsured by 2010.  相似文献   
734.
This Issue Brief discusses the emerging issue of "defined contribution" (DC) health benefits. The term "defined contribution" is used to describe a wide variety of approaches to the provision of health benefits, all of which have in common a shift in the responsibility for payment and selection of health care services from employers to employees. DC health benefits often are mentioned in the context of enabling employers to control their outlay for health benefits by avoiding increases in health care costs. DC health benefits may also shift responsibility for choosing a health plan and the associated risks of choosing a plan from employers to employees. There are three primary reasons why some employers currently are considering some sort of DC approach. First, they are once again looking for ways to keep their health care cost increases in line with overall inflation. Second, some employers are concerned that the public "backlash" against managed care will result in new legislation, regulations, and litigation that will further increase their health care costs if they do not distance themselves from health care decisions. Third, employers have modified not only most employee benefit plans, but labor market practices in general, by giving workers more choice, control, and flexibility. DC-type health benefits have existed as cafeteria plans since the 1980s. A cafeteria plan gives each employee the opportunity to determine the allocation of his or her total compensation (within employer-defined limits) among various employee benefits (primarily retirement or health). Most types of DC health benefits currently being discussed could be provided within the existing employment-based health insurance system, with or without the use of cafeteria plans. They could also allow employees to purchase health insurance directly from insurers, or they could drive new technologies and new forms of risk pooling through which health care services are provided and financed. DC health benefits differ from DC retirement plans. Under a DC health plan, employees may face different premiums based on their personal health risk and perhaps other factors such as age and geographic location. Their ability to afford health insurance may depend on how premiums are regulated by the state and how much money their employer provides. In contrast, under a DC retirement plan, employers' contributions are based on the same percentage of income for all employees, but employees are not subject to paying different prices for the same investment.  相似文献   
735.
When Canada was founded, health care was delegated as a provincial responsibility. Although the federal government shares a portion of health care costs, it is not directly responsible for the planning, delivery, and governance of health services. The 1984 Canada Health Act set national standards for the provision of physician and hospital services, but it does not apply to home care and long-term care facilities. Consequently, each province has established a unique approach to long-term care, resulting in a health policy mosaic. This paper examines different approaches to funding long-term care with a particular emphasis on the impacts of regionalization and of the implementation of case-mix-based funding systems.  相似文献   
736.
The influence of religious and ethnic differences on marital intimacy was examined by administering the Personal Assessment of Intimacy in Relationships and a demographic/attitudinal questionnaire to 25 Jewish couples (intramarried) and 25 couples with one Jewish partner (intermarried). All couples were childless and in the first 5 years of their first marriage. Results indicated that the groups did not differ regarding couple level of intimacy, similarity of intimate experience, or mutual understanding. However, in-depth interviews revealed differences in the pathways by which these two groups arrived at a similar level of intimacy. Intramarried couples appear to experience greater personal similarity and mutual understanding rooted in their ethnic bond, which aids the development of intimacy. Intermarried couples appear to find that the very process of negotiating ethnic differences leads to greater mutual understanding and intimacy. These findings indicate that clinicians and religious leaders should not assume that intermarriage constrains levels of intimacy. Nor should it be assumed that intramarriage assures high intimacy.  相似文献   
737.
Forty married couples participated in a randomized trial comparing 8 weekly sessions of emotion-focused therapy (EFT) for couples to a group of couples who were placed on an 8-week waiting list. A composite marital satisfaction score was created from scores on the Dyadic Adjustment Scale, Positive Feelings Questionnaire, and Personal Assessment of Intimacy in Relationships scale. Controlling for pretest scores, participants in the treatment group had significantly higher levels of marital satisfaction after 8 weeks than wait-list participants. Supplementary analyses identified variables associated with gains in therapy and with dropping out of the study.  相似文献   
738.
739.
A family-based substance abuse prevention program was evaluated which emphasizes family cohesion, school and peer attachment, self-esteem, and attitudes about adolescent use of alcohol and tobacco. The program was implemented in rural communities and targeted families with students entering middle or junior high school. Baseline surveys were conducted with students and parents in four schools and were readministered one year later. Because the program was voluntary, a quasi-experimental design was used to compare participants (29 students and 28 parents) and nonparticipants (268 students and 134 parents). Analyses of covariance indicated that student participants, as compared to nonparticipants, had higher family cohesion, less family fighting, greater school attachment, higher self-esteem, and believed that alcohol should be consumed at an older age at the one year follow-up. There were fewer significant results for parent participants. Strategies for involving parents in prevention programs are discussed.  相似文献   
740.
Using a quasiexperimental design, this study evaluated the effectiveness of CASAs in achieving positive outcomes for children, and examined the process variables believed to lead to permanency for children. Data were collected from court and CASA program files over a two-year period on 200 children, who were compared to children without CASA volunteers on outcome and process variables. Findings indicate that CASAs may have helped reduce the number of placements and court continuances children experienced, and that more services were provided to children with CASAs than to those without. Additional research is needed to further evaluate the impact of CASA services on children.  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