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   1066篇
  免费   61篇
管理学   146篇
民族学   9篇
人口学   76篇
丛书文集   5篇
理论方法论   149篇
综合类   8篇
社会学   621篇
统计学   113篇
  2023年   9篇
  2022年   9篇
  2021年   14篇
  2020年   38篇
  2019年   26篇
  2018年   31篇
  2017年   57篇
  2016年   45篇
  2015年   31篇
  2014年   49篇
  2013年   178篇
  2012年   38篇
  2011年   43篇
  2010年   28篇
  2009年   34篇
  2008年   32篇
  2007年   37篇
  2006年   29篇
  2005年   30篇
  2004年   31篇
  2003年   26篇
  2002年   36篇
  2001年   19篇
  2000年   17篇
  1999年   27篇
  1998年   11篇
  1997年   16篇
  1996年   9篇
  1995年   10篇
  1994年   9篇
  1993年   12篇
  1992年   12篇
  1991年   8篇
  1990年   15篇
  1989年   10篇
  1988年   7篇
  1987年   6篇
  1986年   8篇
  1985年   12篇
  1984年   10篇
  1983年   11篇
  1982年   7篇
  1981年   4篇
  1979年   7篇
  1978年   6篇
  1977年   3篇
  1976年   3篇
  1975年   3篇
  1974年   4篇
  1968年   3篇
排序方式: 共有1127条查询结果,搜索用时 15 毫秒
91.
This study explored how health, wealth, and family ties shape older cohabitors' chances of marrying or separating. Drawing on rational choice and exchange theories, the author argues these factors affect women and men differently because the rewards, alternatives, and barriers of later‐life union formation differ by gender. The study used panel data from the 1998–2006 Health and Retirement Study and a sample of cohabitors 50 and older (N = 1,136). For older female cohabitors, large families and entitlement income lower the risk of marrying, whereas close social networks raise the risk of separating. Moreover, health and wealth have an interactive relationship in that the risk of marrying is highest for unhealthy male cohabitors when they are very wealthy but is highest for the poorest female cohabitors when they are in excellent health. Older men may be exchanging economic resources for caregiving, and cohabitation may be an adaptive response to the gendered costs and barriers of later‐life union formation.  相似文献   
92.
93.
The social work profession has been too little concerned with policy, program, and practice issues related to human sexuality. Changing times and new knowledge require that the profession deal with this area more competently. Studies indicate that human sexuality is affected by biological, cultural, and psychological factors; that the female and male sex drives and physiological responses are similar; that the incidence of premarital and extramarital sexual relations are probably increasing along with more emphasis on the quality of the total interpersonal relationship; and that sexual behavior and values vary between socioeconomic groups.  相似文献   
94.
Demonstration of a dose-response relationship for environmental tobacco smoke (ETS) is an important indication of causality. Central to the analysis and interpretation of dose-response relations as described in epidemiological studies is the relationship between dose and exposure. It must be recognized that in studies of ETS we have only surrogate measures of dose, and these surrogate measures (based on exposure) are imperfect. The question-based measures of ETS exposure generally have not been standardized, may have limited validity and reliability, and cannot comprehensively describe total ETS exposure, exposure to individual ETS components, nor doses of biologically relevant agents at target sites. Nevertheless, useful data have been yielded in epidemiologic studies linking ETS exposure to increased respiratory infection and symptoms, reduced lung growth in children, and increased lung cancer in nonsmoking adults. The more consistent exposure-response data for studies on acute health in children may reflect the greater difficulty in measuring exposure in studies of chronic health in adults.  相似文献   
95.
Risk Homeostasis Theory and Traffic Accident Data   总被引:3,自引:0,他引:3  
The risk homeostasis theory posits, in essence, that a control mechanism analogous to the thermal homeostatic system in warm-blooded animals tends to keep risk per unit time constant, and, as a consequence, the number of traffic accidents per unit time of driving also tends to remain constant, essentially independent of changes in the traffic safety system. It is the purpose of the present research to examine the validity of this claim using a wide variety of traffic accident data. All the data examined are found to be incompatible with the risk homeostasis theory. The only specific field accident data offered in the literature to support the risk homeostasis theory are found to, in fact, refute the theory. The accident data provide evidence that a rich variety of user responses occur. While it is possible for users to collectively respond in such a way that safety benefits are completely cancelled, such a response is not particularly common; it is certainly not universally occurring, as suggested by the risk homeostasis theory. It is concluded that the risk homeostasis theory should be rejected because there is no convincing evidence supporting it and much evidence refuting it.  相似文献   
96.
Hammitt  James K.  Belsky  Eric S.  Levy  Jonathan I.  Graham  John D. 《Risk analysis》1999,19(6):1037-1058
Residential building codes intended to promote health and safety may produce unintended countervailing risks by adding to the cost of construction. Higher construction costs increase the price of new homes and may increase health and safety risks through income and stock effects. The income effect arises because households that purchase a new home have less income remaining for spending on other goods that contribute to health and safety. The stock effect arises because suppression of new-home construction leads to slower replacement of less safe housing units. These countervailing risks are not presently considered in code debates. We demonstrate the feasibility of estimating the approximate magnitude of countervailing risks by combining the income effect with three relatively well understood and significant home-health risks. We estimate that a code change that increases the nationwide cost of constructing and maintaining homes by $150 (0.1% of the average cost to build a single-family home) would induce offsetting risks yielding between 2 and 60 premature fatalities or, including morbidity effects, between 20 and 800 lost quality-adjusted life years (both discounted at 3%) each year the code provision remains in effect. To provide a net health benefit, the code change would need to reduce risk by at least this amount. Future research should refine these estimates, incorporate quantitative uncertainty analysis, and apply a full risk-tradeoff approach to real-world case studies of proposed code changes.  相似文献   
97.
Action theory's substantive image of social organization, theory building strategy, and methodological tenets are compared with those of interactionism. Despite polemics to the contrary, action and interaction concepts denote a similar image of social organization and personality. As is argued, the principle difference between the two perspectives revolves around the issue of the most appropriate theory building and methodological strategy. The ontological implications of this fact are examined and found not to justify the continued partitioning of social theory into antagonistic metaphysical camps.  相似文献   
98.
Fatality reductions from increases in safety belt use are estimated taking into account that drivers who change from being nonusers to being users have lower accident involvement rates than the remaining nonusers, a process referred to as "selective recruitment." Analytical functions are derived which express expected fatality reductions in terms of changes in safety belt use rates from an initial rate. The function parameters are determined by requiring that computed average crash rates for nonusers be 53% higher than the rates for users, a recently determined empirical value. These functions show that, depending on the initial use rate and use rate increase, selective recruitment may increase or decrease expected fatality reductions. However, effects are relatively small, in no case exceeding +/- 5.3%.  相似文献   
99.
How do family arrangements affect subjective well-being? We investigate this issue using data pooled from the IsssA and HILDA, both large, representative national samples of Australia (pooled n=38 447). Our regression analysis of cross-sectional and panel data examines how large are the differences in life satisfaction according to marital status and cohabitation. We find that women and men in formal marriages experience higher levels of life satisfaction than do people in other family arrangements. Moreover, both multiple tests in the cross-section, and tests controlling for prior happiness in the panel analysis, suggest that this is a causal relationship. Aggregating up the levels of life satisfaction generated by different marriage and cohabitation arrangements across a lifetime, suggests that a life-long marriage is the most satisfying. Early divorce followed by an enduring second marriage is little worse (because little time is spent outside the married state). But divorce without remarriage, or long lasting cohabitation without formal marriage, reduce the lifetime sum of subjective well-being by 4–12% for both women and men.  相似文献   
100.
The authors examined factors influencing the return rates for attempting to collect active parental consent forms from 21,123 students in the 7th through 10th grades in 41 middle and high schools. Overall return rates from middle schools were higher than from high schools. Schools that offered high levels of staff support for collecting consent forms had higher return rates. Procedures where the consent form was attached to a school form that parents had to complete and return to the school yielded the highest return rate. Implications for how researchers can obtain a high parent consent form return rate are discussed.  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