全文获取类型
收费全文 | 93223篇 |
免费 | 2951篇 |
国内免费 | 3篇 |
专业分类
管理学 | 12651篇 |
民族学 | 547篇 |
人才学 | 25篇 |
人口学 | 7392篇 |
丛书文集 | 540篇 |
教育普及 | 2篇 |
理论方法论 | 9597篇 |
综合类 | 2163篇 |
社会学 | 44311篇 |
统计学 | 18949篇 |
出版年
2023年 | 509篇 |
2021年 | 579篇 |
2020年 | 1516篇 |
2019年 | 2224篇 |
2018年 | 2137篇 |
2017年 | 3217篇 |
2016年 | 2422篇 |
2015年 | 2052篇 |
2014年 | 2640篇 |
2013年 | 18910篇 |
2012年 | 2508篇 |
2011年 | 2264篇 |
2010年 | 2022篇 |
2009年 | 2209篇 |
2008年 | 2092篇 |
2007年 | 1928篇 |
2006年 | 2108篇 |
2005年 | 2367篇 |
2004年 | 2248篇 |
2003年 | 1920篇 |
2002年 | 2029篇 |
2001年 | 2147篇 |
2000年 | 1918篇 |
1999年 | 1794篇 |
1998年 | 1547篇 |
1997年 | 1406篇 |
1996年 | 1375篇 |
1995年 | 1377篇 |
1994年 | 1358篇 |
1993年 | 1331篇 |
1992年 | 1360篇 |
1991年 | 1320篇 |
1990年 | 1278篇 |
1989年 | 1121篇 |
1988年 | 1194篇 |
1987年 | 1073篇 |
1986年 | 970篇 |
1985年 | 1130篇 |
1984年 | 1211篇 |
1983年 | 1086篇 |
1982年 | 1000篇 |
1981年 | 895篇 |
1980年 | 854篇 |
1979年 | 931篇 |
1978年 | 814篇 |
1977年 | 720篇 |
1976年 | 675篇 |
1975年 | 661篇 |
1974年 | 553篇 |
1973年 | 478篇 |
排序方式: 共有10000条查询结果,搜索用时 500 毫秒
721.
This study examines the effect of unionization, right-to-work laws, and participation of women in the labor force on income
inequality. Two distinct models are developed using 1970 and 1980 census data on the 50 states in the U.S. First, an income
inequality model is specified as a beta distribution of the second kind to estimate Gini measures of income inequality. Second,
these Gini estimates are used in a simultaneous equations model. The 1970 results indicate that higher unionization rates
decreased inequality while right-to-work laws increased inequality. In 1980, the measure of inequality was lower in states
with higher female labor force participation.
We thank an unknown referee and the editor for comments and criticisms that greatly improved the paper. The usual caveat applies. 相似文献
722.
Although surveys are extensively used in sociology, there has been a relative neglect of the effect of task definition upon results obtained. The present article examines the effects of one such task variable, length and specificity of the cue, on response sets concerning the frequency and quantity of alcohol consumed. In one survey format, respondents were asked to report the average number of days drinking per month, and the average number of drinks consumed on each of these occasions. In the second format, questions concerning the monthly frequency of alcohol consumption and quantity consumed were decomposed by twelve drinking locations. The results indicate dramatic increases both in terms of frequency and quantity between the two questionnaire formats. Implications of these results are discussed within the framework of the methodological phenomena of telescoping and the social psychological tendency to under-report threatening behaviors. 相似文献
723.
Sources of drug information among adolescent students 总被引:1,自引:0,他引:1
E Mirzaee P M Kingery B E Pruitt G Heuberger R S Hurley 《Journal of drug education》1991,21(2):95-106
A sample of 1023 eighth and tenth grade students in small to medium-sized central Texas school districts was assessed to determine the amount of information they receive from ten sources about six categories of drugs. The amount of information males reported receiving about each drug category was significantly greater than what females reported, and the amount of information that eighth graders reported receiving about each drug category was significantly greater than what tenth graders reported. Television was the primary source of drug information for all categories of drugs except inhalants, for which friends and television were equally important sources. Parents and printed media (magazines or newspapers) were of secondary importance, followed by friends and teachers. Adolescents were less likely to receive drug-related information from experience, siblings, church, doctors, and police. The reliance on the mass media for drug information in smaller school districts is a pattern which has been previously observed in larger urban districts. This consistency suggests that mass media approaches to drug education are likely to be as effective in rural areas and smaller towns as they are among urban adolescents. Implications for television programming are discussed. 相似文献
724.
725.
This study investigates the extent and nature of housing affordability for elderly nonmetropolitan female heads of household
using data from the Panel Study of Income Dynamics. The results indicate that over one-third of elderly nonmetropolitan female
heads of household experience housing poverty and that those who rent, who have fair to poor health, and who are minorities
are particularly vulnerable. Housing affordability, measured by the concept of housing poverty, identifies households struggling
to meet basic needs while the conventional 25% of income for housing expenditures ratio identifies a larger population. The
findings suggest the need for multifaceted public policies to address the problem of housing poverty.
Her research interests include housing affordability, housing and community vitality, and decision making. She received her
Ph.D. from Purdue University.
Sooyoun Park is in the same department as a Project Assistant on a USDA-funded research project entitled “Housing Affordability
in Rural Areas,” which is a joint project between Nebraska and Wisconsin. Her research interests focus on housing management
behavior in relation to housing expenditure burden. She received her Ph.D. from the University of Nebraska-Lincoln. 相似文献
726.
727.
Dr. Mark Griffiths Ph.D. 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》1994,10(4):371-384
A growing body of empirical and theoretical research has concentrated on the overlaps and commonalities among chemical and non-chemical (behavioural) addictions. Pathological gambling has perhaps been the most widely researched behavioural addiction and some of this research has concerned the co-existing links between pathological gambling and alcohol/drug addiction in both the gambling substance abuser and the substance abusing gambler (i.e. cross addiction). This study was of an exploratory nature and attempted to gather information and data regarding gambling cross addictions in the UK. To achieve this, 456 letters were sent to all drug and alcohol helping agencies in England requesting such information. This yielded 210 returns (46% response rate). Results indicated that gambling cross addictions occur in both adults and adolescents and were almost exclusively a male condition. However, it must be noted only just over half of the responding agencies had encountered gambling cross addiction and reasons for this are speculated. Results also indicated the existence of various cross addicted subgroups including an adolescent subgroup who were addicted to fruit machines and abused solvents. Future research ideas are also discussed.A more detailed version of this paper is available from the author on request. 相似文献
728.
729.
730.