全文获取类型
收费全文 | 2621篇 |
免费 | 106篇 |
国内免费 | 1篇 |
专业分类
管理学 | 335篇 |
民族学 | 21篇 |
人口学 | 296篇 |
丛书文集 | 14篇 |
理论方法论 | 295篇 |
综合类 | 29篇 |
社会学 | 1195篇 |
统计学 | 543篇 |
出版年
2023年 | 26篇 |
2022年 | 9篇 |
2021年 | 30篇 |
2020年 | 69篇 |
2019年 | 97篇 |
2018年 | 119篇 |
2017年 | 137篇 |
2016年 | 89篇 |
2015年 | 63篇 |
2014年 | 83篇 |
2013年 | 521篇 |
2012年 | 104篇 |
2011年 | 97篇 |
2010年 | 81篇 |
2009年 | 63篇 |
2008年 | 83篇 |
2007年 | 83篇 |
2006年 | 74篇 |
2005年 | 66篇 |
2004年 | 53篇 |
2003年 | 57篇 |
2002年 | 48篇 |
2001年 | 49篇 |
2000年 | 37篇 |
1999年 | 42篇 |
1998年 | 32篇 |
1997年 | 26篇 |
1996年 | 29篇 |
1995年 | 32篇 |
1994年 | 29篇 |
1993年 | 32篇 |
1992年 | 32篇 |
1991年 | 31篇 |
1990年 | 19篇 |
1989年 | 21篇 |
1988年 | 19篇 |
1987年 | 14篇 |
1986年 | 11篇 |
1985年 | 24篇 |
1984年 | 22篇 |
1983年 | 20篇 |
1982年 | 19篇 |
1981年 | 25篇 |
1980年 | 15篇 |
1979年 | 15篇 |
1978年 | 10篇 |
1976年 | 14篇 |
1975年 | 14篇 |
1974年 | 12篇 |
1973年 | 5篇 |
排序方式: 共有2728条查询结果,搜索用时 62 毫秒
1.
When Working Hard Is Not Enough for Female and Racial/Ethnic Minority Apprentices in the Highway Trades
下载免费PDF全文
![点击此处可从《Sociological Forum》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Maura Kelly Lindsey Wilkinson Maura Pisciotta Larry S. Williams 《Sociological Forum》2015,30(2):415-438
Drawing on employment records, qualitative interviews, and a survey, we explore the experiences of apprentices in the highway trades in Oregon. We demonstrate that female and racial/ethnic minority apprentices have lower rates of recruitment and retention and disproportionately face challenges with interpersonal interactions, hiring practices, and supervisory practices. Yet, we find a pervasive narrative that attributes apprentices' success to “hard work,” which contributes to the legitimacy of these inequalities. Consistent with the conceptualization of work organizations as inequality regimes, we argue that the apprenticeship system has policies, practices, and ideologies that are on the surface gender and race/ethnicity neutral, yet lead to the perpetuation of inequalities. 相似文献
2.
Stephen J. Ruberg Frank E. Harrell Jr. Margaret Gamalo-Siebers Lisa LaVange J. Jack Lee Karen Price 《The American statistician》2019,73(1):319-327
ABSTRACTThe cost and time of pharmaceutical drug development continue to grow at rates that many say are unsustainable. These trends have enormous impact on what treatments get to patients, when they get them and how they are used. The statistical framework for supporting decisions in regulated clinical development of new medicines has followed a traditional path of frequentist methodology. Trials using hypothesis tests of “no treatment effect” are done routinely, and the p-value < 0.05 is often the determinant of what constitutes a “successful” trial. Many drugs fail in clinical development, adding to the cost of new medicines, and some evidence points blame at the deficiencies of the frequentist paradigm. An unknown number effective medicines may have been abandoned because trials were declared “unsuccessful” due to a p-value exceeding 0.05. Recently, the Bayesian paradigm has shown utility in the clinical drug development process for its probability-based inference. We argue for a Bayesian approach that employs data from other trials as a “prior” for Phase 3 trials so that synthesized evidence across trials can be utilized to compute probability statements that are valuable for understanding the magnitude of treatment effect. Such a Bayesian paradigm provides a promising framework for improving statistical inference and regulatory decision making. 相似文献
3.
As important members of research teams, statisticians bear an ethical responsibility to analyze, interpret, and report data honestly and objectively. One way of reinforcing ethical responsibilities is through required courses covering a variety of ethics-related topics at the graduate level. We assessed ethics requirements for graduate-level statistics training programs in the United States for the 2013–2014 academic year using the websites of 88 universities, examining 103 biostatistics programs, and 136 statistics degree programs. We categorized programs’ ethics training requirements as required or not required. Thirty-one (35.1%) universities required an ethics course for at least some degree students. Sixty-two (25.5%) degree programs required an ethics course for at least some students. The majority (77.4%) of required courses were worth 0 or 1 credit. Of the 177 programs without an ethics requirement, 19 (10.7%) listed an ethics elective. Although a single ethics course is insufficient for instilling an ethical approach to science, degree programs that model expectations through coursework point to the value of ethics in science. More training programs should prepare statisticians to consider the ethical dimensions of their work through required coursework. Supplementary materials for this article are available online. 相似文献
4.
Journal of Population Research - This paper details efforts to link administrative records from the Internal Revenue Service (IRS) to American Community Survey (ACS) and 2010 Census microdata for... 相似文献
5.
Michael P. Fay Ji-Hyun Lee 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》2006,169(1):81-96
Summary. We detail a general method for measuring agreement between two statistics. An application is two ratios of directly standardized rates which differ only by the choice of the standard. If the statistics have a high value for the coefficient of agreement then the expected squared difference between the statistics is small relative to the variance of the average of the two statistics, and inferences vary little by changing statistics. The estimation of a coefficient of agreement between two statistics is not straightforward because there is only one pair of observed values, each statistic calculated from the data. We introduce estimators of the coefficient of agreement for two statistics and discuss their use, especially as applied to functions of standardized rates. 相似文献
6.
A finite mixture model using the multivariate t distribution has been shown as a robust extension of normal mixtures. In this paper, we present a Bayesian approach for inference about parameters of t-mixture models. The specifications of prior distributions are weakly informative to avoid causing nonintegrable posterior distributions. We present two efficient EM-type algorithms for computing the joint posterior mode with the observed data and an incomplete future vector as the sample. Markov chain Monte Carlo sampling schemes are also developed to obtain the target posterior distribution of parameters. The advantages of Bayesian approach over the maximum likelihood method are demonstrated via a set of real data. 相似文献
7.
The 1998 Korean Survey of Family Income and Expenditures was used to examine the overall consumption and saving behavior of Korean baby boomers and compared the differences in consumption and saving behavior between older and younger boomers. The t -test results indicated that the younger boomers allocated a significantly higher percentage of their expenditures on food away from home, household appliances, transportation and communication than did the older boomers, whereas the older boomers spent higher amounts and allocated larger budget shares on their children's education than did the younger boomers. The results of Ordinary Least-Squares (OLS) regression analysis showed that, holding other factors constant, older boomers not only spent significantly more in the total consumption expenditures and education expenditures, but older boomers also saved significantly less than did younger boomers. 相似文献
8.
Larry W. Koch 《The American Sociologist》1995,26(1):76-86
A number of researchers have recently challenged the long-held notion among criminologists that rape, along with most other
violent crimes, is an intraracial crime. Based on analysis of survey data they concluded that black rapists “prefer” or “seek
out” white victims and that the likelihood of a black offender selecting a white victim has been increasing during recent
years. Data presented here (1977–88 National Crime Surveys) refute the notion that black rapists “prefer” white victims. Moreover
these same data fail to support the contention that rapes involving black offenders and white victims have been increasing.
According to National Crime Survey estimates, the proportion of black offenders that victimize whites has been declining.
An earlier version of this paper was presented at the annual meetings of the American Society of Criminology, November 1991. 相似文献
9.
We consider the assessment of outliers and influential observation in non-linear measurement error models. Residuals, leverage measures and case-deletiondiagonostics are examined. The method of local influence is also applied to the models. In particular, the perturbation of measurement error variances has been found useful in assessing the adequancy of the model assumptions. A numerical example is given to illustrate the application of the diagonostics. 相似文献
10.
Larry L. Constantine 《Journal of marital and family therapy》1993,19(1):39-70
The theory of family paradigms provides an integrative framework for under-standing and systematizing the diverse ways that families organize and make sense of family life. Using formal methods of analysis based on logical and geometrical arguments, the priecise implications of models of family types can be investigated and compared. The paradigmatic framework can thus be refined and extended to form a more rigorous theoretical grounding for family typologies is explored and a miltidimensional model is derived the geometry of which is equivalent to, but more succinctly captures, the underlying structure of uariation in family para-digms. In Part II, the resulting model is interpredtd and explored in terms of implications for family theory, theory construction, and family therapy. Clarifying the basic dimensions of the paradigmatic framework also permits more precise exploration of interrelationships among related models of family types, which can be understood as reduced models derivable from the complete geometry of the paradigmatic framework. 相似文献