全文获取类型
收费全文 | 11158篇 |
免费 | 181篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1727篇 |
民族学 | 53篇 |
人才学 | 1篇 |
人口学 | 970篇 |
丛书文集 | 51篇 |
理论方法论 | 995篇 |
综合类 | 109篇 |
社会学 | 5667篇 |
统计学 | 1768篇 |
出版年
2020年 | 140篇 |
2019年 | 188篇 |
2018年 | 215篇 |
2017年 | 261篇 |
2016年 | 240篇 |
2015年 | 181篇 |
2014年 | 232篇 |
2013年 | 1933篇 |
2012年 | 258篇 |
2011年 | 293篇 |
2010年 | 235篇 |
2009年 | 212篇 |
2008年 | 283篇 |
2007年 | 280篇 |
2006年 | 269篇 |
2005年 | 269篇 |
2004年 | 238篇 |
2003年 | 205篇 |
2002年 | 253篇 |
2001年 | 234篇 |
2000年 | 248篇 |
1999年 | 199篇 |
1998年 | 189篇 |
1997年 | 175篇 |
1996年 | 170篇 |
1995年 | 187篇 |
1994年 | 183篇 |
1993年 | 174篇 |
1992年 | 183篇 |
1991年 | 201篇 |
1990年 | 212篇 |
1989年 | 183篇 |
1988年 | 208篇 |
1987年 | 186篇 |
1986年 | 157篇 |
1985年 | 167篇 |
1984年 | 187篇 |
1983年 | 186篇 |
1982年 | 127篇 |
1981年 | 110篇 |
1980年 | 116篇 |
1979年 | 145篇 |
1978年 | 126篇 |
1977年 | 98篇 |
1976年 | 115篇 |
1975年 | 78篇 |
1974年 | 90篇 |
1973年 | 67篇 |
1972年 | 56篇 |
1970年 | 53篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
How accurately can you measure quality of care in health care? Recently, HMOs and other types of managed care organizations have been in the process of defining quality in quantitative terms. Physicians who utilize fewer resources and who care for more patients per-unit-of-time are valued as providing better care than colleagues who may work at a slower (more expensive?) pace. The pressure to evaluate or treat greater numbers of patients in shorter periods of time can produce adverse consequences. And numbers do not necessarily take into account the quality of the care delivered. There is clearly a middle road. Physicians must take care of a sufficient number of patients with a given problem to gain and maintain expertise and mastery. But they must also guard against the insidious pressure for the procedure to become the end in itself. 相似文献
142.
Medical practices historically have not been examined in terms of their organizational structures and of the appropriateness of their structures for survival as business entities. In this paper, we propose a model for the typical medical practice and discuss its fit with current organizational theory. It is apparent that the medical practice organization does not fit with the demands of a rapidly changing and complex environment. To survive and grow, the medical practice organization must align itself with others that have an interest and stake in the health care system, develop teamwork among physicians, bridge the gap between physicians and others in the organization, and recognize that the work done in the organization depends on other components of the organization. 相似文献
143.
James Redekop 《Social Choice and Welfare》1996,13(1):95-112
The original Arrow Theorem and many variants were stated with the Universal Domain assumption; but in economic situations, natural assumptions like monotonicity restrict the domain so that the Theorem does not apply. Since 1979, several authors have proved Arrow-type impossibility results in situations such as models with public goods or private goods; and a few have considered mixed-goods or stochastic alternatives models. This paper has similar results in models with mixed-goods, stochastic, and dynamic alternatives; the objects of preference can have any two features or all three. With suitable qualifications, the impossibility result continues to hold, as does the Arrow-inconsistency of arbitrarily small domains type of result I have established elsewhere. 相似文献
144.
This study examines the impact of mandatory seat belt laws on fatal and incapacitating injury rates in the states. Annual data for all 50 states for the period 1975-1991 are used. Pooled time series analysis is employed. The general conclusion that emerges from this analysis is that seat belt laws significantly impact state fatal injury rates. Primary enforcement and all-seat coverage provisions appear to be particularly effective in reducing fatality rates. 相似文献
145.
The projected increase of people in Japan aged 75 years and older in the years to come implies the increase of the disabled elderly. Thus, the core of societal preparation for the aging of the population is generally considered to be the expansion of services for the disabled elderly. However, gerontological studies on the health status of the elderly conducted in Japan show that the prevalence of disability is quite low and even decreasing. Relative to the services for the disabled elderly, preventive services for the healthy elderly have long been overlooked. In 1994, the Metropolitan Tokyo Government organized a task force to develop a new health education program as the preventive health service for the healthy urban elderly. A preliminary plan outlining the health education program--consisting of propagation with a booklet, on-the-job training of practitioners, and development of new curricula and teaching materials--was proposed by the authors for discussion within the task force. Although the inquiry has just begun and the plan is still nascent, it seems adequate to fit the needs for preventive health services in the near future. 相似文献
146.
Suen W 《Journal of population economics》1997,10(4):443-461
This paper provides an overview of retirement patterns in Hong Kong on the basis of limited data. A censored regression model
is used to infer the retirement age from people‘s current retirement status and their current age. This model is equivalent
to a restricted probit model, and the interpretation of parameters is straightforward. The results clearly show a negative
income effect on the retirement decision. The retirement age seems to be positively related to lifetime earnings but negatively
related to the rate of decline of earnings with age.
JEL classification: C24, J14, J26
Received May 6, 1996 / Accepted February 5, 1997 相似文献
147.
This paper models household fertility decisions by using a generalized Poisson regression model. Since the fertility data
used in the paper exhibit under-dispersion, the generalized Poisson regression model has statistical advantages over both
standard Poisson and negative binomial regression models, and is suitable for analysis of count data that exhibit either over-dispersion
or under-dispersion. The model is estimated by the method of maximum likelihood. Approximate tests for the dispersion and
goodness-of-fit measures for comparing alternative models are discussed. Based on observations from the Panel Study of Income
Dynamics of 1989 interviewing year, the empirical results support the fertility hypothesis of Becker and Lewis (1973).
Received January 7, 1997 /Accepted April 3, 1997 相似文献
148.
Mortality Risk Perceptions: A Bayesian Reassessment 总被引:1,自引:1,他引:0
"This study uses data on perceived and actual mortality risks to test several alternative Bayesian models of the factors influencing risk beliefs. The analysis...indicates that while the hazard rate for the individual age group is an influential factor, the overall population death rate and the discounted expected number of life years lost due to the cause of death are also influential in affecting risk perceptions.... The predictive power of a linear perception model increases with the level of the risk and is least accurate for very small risks." 相似文献
149.
James E. Levine 《Clinical Social Work Journal》1997,25(2):197-209
Constructionist notions have become commonplace in theoretical discussions of the self, but are seldom translated into consideration of specific social work practice concerns such as ADHD. Explorations of ADHD, on the other hand, typically emphasize a narrow, medically-oriented symptom picture that is devoid of the psychosocial context in which the so-called symptoms emerge. A transactional approach to the understanding of ADHD is advanced. This article promotes a link between constructionism and social work's psychosocial or person-in-environment perspective. Such a perspective supports approaches to the assessment of ADHD that illuminate larger cultural messages and their constraining influence on individual meaning-making. Intervention, conducted at multiple levels, must be geared to the establishment of more hopeful and affirming narratives. 相似文献
150.
The Community Prevention Trial was 5-year effort to reduce alcohol-involved injuries and death through a comprehensive program of community awareness and policy activities. The three experimental communities were of approximately 100,000 population each (one in Northern California, one in Southern California, and one in South Carolina). Matched comparison communities were used for each experimental community. This article describes the evaluation approach used in a program that sought to change environmental factors not a specific population or target group. This approach demanded unique evaluation approaches for determining overall community aggregate effects, that is, distal outcomes, as well as changes in key mediating variables, that is, process effects. The problem of trending and lagged effects of community prevention programs are discussed. 相似文献