全文获取类型
收费全文 | 8987篇 |
免费 | 194篇 |
专业分类
管理学 | 1335篇 |
民族学 | 32篇 |
人口学 | 845篇 |
丛书文集 | 32篇 |
理论方法论 | 748篇 |
综合类 | 111篇 |
社会学 | 4003篇 |
统计学 | 2075篇 |
出版年
2021年 | 47篇 |
2020年 | 138篇 |
2019年 | 177篇 |
2018年 | 255篇 |
2017年 | 320篇 |
2016年 | 227篇 |
2015年 | 156篇 |
2014年 | 229篇 |
2013年 | 1498篇 |
2012年 | 294篇 |
2011年 | 281篇 |
2010年 | 219篇 |
2009年 | 200篇 |
2008年 | 186篇 |
2007年 | 234篇 |
2006年 | 197篇 |
2005年 | 199篇 |
2004年 | 176篇 |
2003年 | 174篇 |
2002年 | 185篇 |
2001年 | 217篇 |
2000年 | 206篇 |
1999年 | 192篇 |
1998年 | 142篇 |
1997年 | 136篇 |
1996年 | 138篇 |
1995年 | 117篇 |
1994年 | 117篇 |
1993年 | 104篇 |
1992年 | 148篇 |
1991年 | 127篇 |
1990年 | 125篇 |
1989年 | 116篇 |
1988年 | 103篇 |
1987年 | 101篇 |
1986年 | 104篇 |
1985年 | 121篇 |
1984年 | 119篇 |
1983年 | 136篇 |
1982年 | 107篇 |
1981年 | 98篇 |
1980年 | 92篇 |
1979年 | 101篇 |
1978年 | 94篇 |
1977年 | 83篇 |
1976年 | 69篇 |
1975年 | 70篇 |
1974年 | 64篇 |
1973年 | 58篇 |
1971年 | 49篇 |
排序方式: 共有9181条查询结果,搜索用时 31 毫秒
81.
We specify and estimate a model of the early employment growth of technology-driven new ventures. Our estimated model is derived
from labor demand theory. A data set of 100 German firms is used to conduct this analysis. The study’s findings support the
relevance of the theory as applied to these nascent firms. Employment growth is significantly enhanced in ventures exhibiting
high profits, experienced founders, formal information processes, and outsourced product distribution. Our findings also confirm
aspects of Penrose’s theory of firm growth suggesting that transactions costs associated with larger founder teams may inhibit
employment growth. 相似文献
82.
Standard algorithms for the construction of iterated bootstrap confidence intervals are computationally very demanding, requiring nested levels of bootstrap resampling. We propose an alternative approach to constructing double bootstrap confidence intervals that involves replacing the inner level of resampling by an analytical approximation. This approximation is based on saddlepoint methods and a tail probability approximation of DiCiccio and Martin (1991). Our technique significantly reduces the computational expense of iterated bootstrap calculations. A formal algorithm for the construction of our approximate iterated bootstrap confidence intervals is presented, and some crucial practical issues arising in its implementation are discussed. Our procedure is illustrated in the case of constructing confidence intervals for ratios of means using both real and simulated data. We repeat an experiment of Schenker (1985) involving the construction of bootstrap confidence intervals for a variance and demonstrate that our technique makes feasible the construction of accurate bootstrap confidence intervals in that context. Finally, we investigate the use of our technique in a more complex setting, that of constructing confidence intervals for a correlation coefficient. 相似文献
83.
1. Childbearing for incarcerated women is complicated by characteristics of special needs associated with psychosocial adaptation to increased stress, a restrictive physical environment, alteration of social support systems, and the displacement of the maternal role functions after birth. 2. Psychiatric nurses are in a unique position to affect the health care provided for pregnant inmates by virtue of their knowledge and expertise in assessing and treating problems in psychosocial adaptation. 3. Assessment of pregnant inmates is based on identification of the presence and magnitude of dimensions of stress, environmental restrictiveness, social support systems, and maternal role displacement. 相似文献
84.
John G. Wilson 《Journal of Risk and Uncertainty》1992,5(1):91-99
An easily applied approach is developed to provide one participant in a sequence of conflicts with an optimal strategy. A goal of this article is to demonstrate that it is mathematically feasible to incorporate a decision maker's subjective distributions over the effects his actions will have on the outcomes of future conflicts. Unlike many other approaches, the model of this article does not restrict the beliefs that the participant is allowed to express. The participant, not the decision theorist, decides on what is relevent. Model assumptions required for updating rules, such as Bayesian updating, are not required unless they really are appropriate for the situation.Thanks are due to J. B. Kadane for suggesting the problem and for many helpful discussions. 相似文献
85.
Recent debates about flows of help within the family have indicated considerable diversity according to the type of help (money, services), and ages and gender of those involved, and have shown that values are only a partial guide to the scale of such flows. This paper focuses on a particular occasion for help, young people's housing, and a particular region, South-East England, where one would expect family financial help to be high given the capacity to help of older generations (due to higher average incomes and wealth) and the affordability problems faced by young people. It is shown that contrary to hypothesis only 12% of a sample of young people had received financial help for housing purposes since they had left home, less than found in previous studies with different samples. The amounts involved were less than young people believed their parents could afford. The role of inheritance was also found to be minor. The results from the different studies are explained as due to changes in the housing market, changing values regarding financial help and differences among the samples. Intensive re-interviews with three households from very different backgrounds are used to show the different ways in which family help operates. 相似文献
86.
G. Walls 《International Journal of Social Welfare》1995,4(1):28-35
My aim was to study the experiences and priorities of two age groups of social work students practicing in client-centered social work. This article is based on the research on rationality and language games in social work. The target groups of the research project as a whole were the actors: the heads and social workers or activists in public social welfare and health care agencies and institutions and in voluntary associations and action groups, and finally, two subsequent classes of students from a school of social work, during their practicing periods. This article concentrates on the trainees. At first, the trainees wrote essays and kept diaries. Secondly, they marked their standings on graphs visualizing different types of information contents and social relation structures. Thirdly, they made their choices of reasons for and solutions to social problems on a problem wheel. The trainees' study, using different data gathering techniques, partly confirms the results of the research of the other actor groups, in which the data were derived using questionnaires and interviews. The trainees' study shows variation in the respondents' priorities within and between specified social problem categories. Qualitatively analyzed, however, the characterizations of social work, both those who currently act in and those aiming to enter this field, resemble one another. 相似文献
87.
INNUMERACY ABOUT MINORITY POPULATIONS 总被引:1,自引:0,他引:1
We use a small but nationally representative sample to investigatethe sources of innumeracy regarding the proportion of blacks,Hispanics, and Jews in the U.S. population. In addition to anumber of standard demographic differences, we find that overestimatesare closely related to region as well as to the density of thelocal black/Hispanic population. The extent to which minoritypopulations are perceived as a kind of threat is also relatedto perceived proportions, though the direction of causalitycannot be determined. We discuss the meaningfulness of thesepopulation estimates and speculate on whether trying to improvethem would alter attitudes toward minorities. 相似文献
88.
With the increasing pressure on social and health care resources,professionals have to be more explicit in their decision makingregarding the long-term care of older people. This groundedtheory study used 19 focus groups and nine semi-structured interviews(99 staff in total) to explore professional perspectives onthis decision making. Focus group participants and intervieweescomprised care managers, social workers, consultant geriatricians,general medical practitioners, community nurses, home care managers,occupational therapists and hospital discharge support staff.The emerging themes spanned context, clients, families and services.Decisions were often prompted by a crisis, hindering professionalsseeking to make a measured assessment. Fear of burglary andassault, and the willingness and availability of family to helpwere major factors in decisions about living at home. Serviceavailability in terms of public funding for community care,the availability of home care workers and workload pressureson primary care services influenced decision thresholdsregarding admission to institutional care. Assessment toolsdesigned to assist decision making about the long-term careof older people need to take into account the critical aspectsof individual fears and motivation, family support and the availabilityof publicly funded services as well as functional and medicalneeds. 相似文献
89.
90.