全文获取类型
收费全文 | 89722篇 |
免费 | 1966篇 |
国内免费 | 5篇 |
专业分类
管理学 | 12308篇 |
民族学 | 532篇 |
人才学 | 25篇 |
人口学 | 6744篇 |
丛书文集 | 510篇 |
理论方法论 | 9303篇 |
综合类 | 2099篇 |
社会学 | 41414篇 |
统计学 | 18758篇 |
出版年
2023年 | 508篇 |
2021年 | 570篇 |
2020年 | 1511篇 |
2019年 | 2201篇 |
2018年 | 2051篇 |
2017年 | 3107篇 |
2016年 | 2358篇 |
2015年 | 2050篇 |
2014年 | 2623篇 |
2013年 | 18862篇 |
2012年 | 2247篇 |
2011年 | 2062篇 |
2010年 | 1919篇 |
2009年 | 2158篇 |
2008年 | 1994篇 |
2007年 | 1799篇 |
2006年 | 2042篇 |
2005年 | 2245篇 |
2004年 | 2117篇 |
2003年 | 1841篇 |
2002年 | 1948篇 |
2001年 | 1923篇 |
2000年 | 1715篇 |
1999年 | 1636篇 |
1998年 | 1475篇 |
1997年 | 1321篇 |
1996年 | 1275篇 |
1995年 | 1313篇 |
1994年 | 1288篇 |
1993年 | 1255篇 |
1992年 | 1247篇 |
1991年 | 1177篇 |
1990年 | 1173篇 |
1989年 | 1011篇 |
1988年 | 1106篇 |
1987年 | 974篇 |
1986年 | 874篇 |
1985年 | 1032篇 |
1984年 | 1104篇 |
1983年 | 983篇 |
1982年 | 926篇 |
1981年 | 847篇 |
1980年 | 800篇 |
1979年 | 852篇 |
1978年 | 764篇 |
1977年 | 682篇 |
1976年 | 646篇 |
1975年 | 621篇 |
1974年 | 507篇 |
1973年 | 428篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
971.
972.
Rubén G. Rumbaut 《Sociological Forum》1994,9(4):583-621
Contemporary immigration to the United States and the formation of new ethnic groups are the complex and unintended social consequences of the expansion of the nation to its post-World War II position of global hegemony. Immigrant communities in the United States today are related to a history of American military, political, economic, and cultural involvement and intervention in the sending countries, especially in Asia and the Caribbean Basin, and to the linkages that are formed in the process that open a variety of legal and illegal migration pathways. The 19.8 million foreign-born persons counted in the 1990 U.S. census formed the largest immigrant population in the world, though in relative terms, only 7.9% of the U.S. population was foreign-born, a lower proportion than earlier in this century. Today's immigrants are extraordinarily diverse, a reflection of polar-opposite types of migrations embedded in very different historical and structural contexts. Also, unlike the expanding economy that absorbed earlier flows from Europe, since the 1970s new immigrants have entered an hourglass economy with reduced opportunities for social mobility, particularly among the less educated, and new waves of refugees have entered a welfare state with expanded opportunities for public assistance. This paper seeks to make sense of the new diversity. A typology of contemporary immigrants is presented, and their patterns of settlement, their distinctive social and economic characteristics compared to major native-born racial-ethnic groups, and their different modes of incorporation in—and consequences for—American society are considered. 相似文献
973.
Frank AW 《Second opinion (Park Ridge, Ill.)》1994,20(1):10-18
In attempting to manage their practices efficiently, doctors may not allow seriously ill patients enough time to sort out their feelings and raise important questions. What is at stake here is not information about prognosis and treatments but the very survival of the soul. 相似文献
974.
Deborah Burnham Albert M. Teplin 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1994,4(4):502-518
The benefits of providing a separate accounting for non-profit organisations in the financial accounts of the United States are discussed. At present, national economic accounts in the US include non-profit organisations with individuals in the household sector; separate information on the financial activity of non-profit institutions until now has not been available. In this paper, aggregate statistics from federal government tax-exempt filings for non-profit institutions are put into a US flow-of-funds framework. The data for the 1982–1988 period indicate that non-profit institutions accounted for a significant and growing proportion of assets of the household sector in the United States. Their liabilities were also a surprisingly large share of the household sector total. Moreover, funds supplied by the non-profit sector for investment were in some years comparable to funds made available by several important groups of non-depository financial intermediaries. Separate accounting for non-profit organisations within national economic accounts would be likely to reveal an important channel for investment financing in the United States and would significantly improve our ability to measure and analyse the financial activity of individuals by allowing for a purer household sector.The analysis and conclusions set forth are those of the authors and do not necessarily indicate concurrence by Salomon Brothers, the Board of Governors, Federal Reserve Banks or other members of their staffs. 相似文献
975.
C. Czado 《Statistical Papers》1994,35(1):189-201
Common binary regression models such as logistic or probit regression have been extended to include parametric link transformation families. These binary regression models with parametric link are designed to avoid possible link misspecification and improve fit in some data sets. One and two parameter link families have been proposed in the literature (for a review see Stukel (1988)). However in real data examples published so far only one parameter link families have found to improve the fit significantly. This paper introduces a two parameter link family involving the modification of both tails of the link. An analysis based on computationally tractable Bayesian inference involving Monte Carlo sampling algorithms is presented extending earlier work of Czado (1992, 1993b). Finally, the usefulness of the two tailed link modification will be demonstrated in an example where single tail modification can be significantly improved upon by using a two tailed modification. 相似文献
976.
This paper considers the application of Stein-type estimation procedure for the coefficients in a linear regression model when data are available from replicated experiment. Two families of estimators characterized by a single scalar are proposed and their large sample asymptotic properties are derived. These are utilized for comparing the performances of the two estimators along with the conventional estimator and conditions for the superiority of one estimator over the other are deduced. 相似文献
977.
Bielefeld W 《Nonprofit management & leadership》1994,5(1):19-36
This article describes mortality patterns for nonprofit organizations in a major U.S. metropolitan area between 1980 and 1988. Twenty percent of the nonprofits in a panel ceased operations during this period. Mortality rates were found to vary widely. In some instances, high mortality was found in parts of the sector that were growing rapidly. Overall, nonprofits that ceased to operate were younger and smaller, used fewer strategies to attract funders, and had less diversified income streams than survivors. These patterns also varied substantially. The results point to the drawbacks of using limited or commonsense information and the necessity of theory-based research. 相似文献
978.
Davis WG 《Physician executive》1994,20(2):15-17
In October 1992, the American College of Physician Executives sponsored a study tour to Berlin, Germany, and Amsterdam, Holland. Meetings were held with government officials, third-party payers, and providers, and on-site visits were made at hospitals, clinics, and academic centers. The purpose was to study the health care delivery system in those countries and to share some insights with the countries' hosts on the U.S. system. In a series of reports that began in the July issue of the journal, 5 of the 10 study tour participants describe their impressions of the tour and of the health care systems in the countries that were visited. In this final report, the implications of the German and Dutch systems for reform of the U.S. health care system are discussed. 相似文献
979.
Changes occurring in health care demand that physicians expand their professional knowledge and skills beyond the medical and behavioral sciences. Subjects absent from traditional medical education curricula, such as the economics and politics of health care, practice management, and leadership of professional organizations, will become important competencies, particularly for physicians who serve in management roles. Because physicians occupy a central role in planning and allocating medical care services and other health care resources, they must be better prepared to work with other health care professionals to create a new civilization, even if this means leaving the cloistered domain of "physician land" to serve as interface professionals between the delivery of medical services and the management of health care. Our research findings and conclusions strongly suggest that economic, management, and leadership competencies need to be incorporated into the professional development of physicians, especially in postgraduate and continuing education curricula. 相似文献
980.
Dr. Diane Davis Ph.D. Dr. JoAnn Ray Ph.D. Claudette Sayles B.S.W. 《Child and Adolescent Social Work Journal》1994,12(6):445-463
Outdoor structured activities, such as Ropes Challenge Courses, are typically utilized as interventions for youth coming from urban settings. Evaluation of such programs is scanty at best. In this instance, the course experience is used as a prevention tool for high risk youth in a remote, rural setting of high unemployment, alcohol problems, and low income. The authors discuss the effectiveness of this approach, and the intended and unintended consequences for the rural community at large. The evaluation design relies on extensive qualitative methodology as well as quantitative methods to capture the unique nature of this rural project. 相似文献