全文获取类型
收费全文 | 19320篇 |
免费 | 350篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2796篇 |
民族学 | 69篇 |
人才学 | 1篇 |
人口学 | 1876篇 |
丛书文集 | 77篇 |
教育普及 | 2篇 |
理论方法论 | 1724篇 |
现状及发展 | 1篇 |
综合类 | 263篇 |
社会学 | 9327篇 |
统计学 | 3535篇 |
出版年
2021年 | 113篇 |
2020年 | 278篇 |
2019年 | 378篇 |
2018年 | 442篇 |
2017年 | 604篇 |
2016年 | 474篇 |
2015年 | 348篇 |
2014年 | 459篇 |
2013年 | 2998篇 |
2012年 | 639篇 |
2011年 | 614篇 |
2010年 | 449篇 |
2009年 | 372篇 |
2008年 | 445篇 |
2007年 | 460篇 |
2006年 | 456篇 |
2005年 | 440篇 |
2004年 | 403篇 |
2003年 | 375篇 |
2002年 | 417篇 |
2001年 | 520篇 |
2000年 | 529篇 |
1999年 | 463篇 |
1998年 | 340篇 |
1997年 | 310篇 |
1996年 | 322篇 |
1995年 | 301篇 |
1994年 | 283篇 |
1993年 | 288篇 |
1992年 | 342篇 |
1991年 | 317篇 |
1990年 | 287篇 |
1989年 | 290篇 |
1988年 | 289篇 |
1987年 | 252篇 |
1986年 | 244篇 |
1985年 | 278篇 |
1984年 | 268篇 |
1983年 | 251篇 |
1982年 | 216篇 |
1981年 | 180篇 |
1980年 | 165篇 |
1979年 | 194篇 |
1978年 | 176篇 |
1977年 | 159篇 |
1976年 | 134篇 |
1975年 | 158篇 |
1974年 | 118篇 |
1973年 | 115篇 |
1972年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
71.
Mining the Data: Analyzing the Economic Implications of Mining for Nonmetropolitan Regions 总被引:1,自引:0,他引:1
Extractive industries such as logging and mining are generally expected to bring significant economic benefits to rural regions, but a growing number of findings have now challenged that common expectation. Still, it is not clear whether the findings of less–than–desirable economic outcomes are isolated or representative. In this article, we assemble literally all of the relevant quantitative findings on mining that we have been able to identify in published and/or technical literature from the United States. In the interest of rigor, we limit the assessment to cases in which strictly nonmetropolitan mining regions are compared against other nonmetropolitan regions and/or against those regions’ own experiences over time. Overall, 301 findings meet the criteria for inclusion. Contrary to the long–established assumptions, but consistent with more recent critiques, roughly half of all published findings indicate negative economic outcomes in mining communities, with the remaining findings being split roughly evenly between favorable and neutral/indeterminate ones. Positive findings are more likely to be associated with incomes than with poverty or (especially) unemployment rates, and they are more likely to come from the western United States, where much of the mining involves relatively large, new coal strip mines. Over half of all positive findings come from the years prior to 1982. In virtually all other categories, the plurality or majority of findings have been negative. When the patterns of findings are subjected to one–sample means tests, the only way to produce a significantly positive outcome is by combining all neutral/indeterminate findings with the positive ones, while focusing exclusively on incomes; by contrast, in the case of poverty or unemployment rates—as well as for the overall body of findings—the results are consistently and significantly negative, whether the neutral/indeterminate findings are combined with negative ones or omitted from the equations altogether. Until or unless future studies produce dramatically different findings, there appears to be no scientific basis for accepting the widespread, “obvious” assumption that mining will lead to economic improvement. 相似文献
72.
Proponents of hazardous and nuclear waste depositories label opponents to local siting of such facilities “NIMBYs” (Not In My Backyard). This study assesses the extent to which the NIMBY label and the strategies of industry proponents to reduce opposition function on a reasonable set of assumptions. Using survey data and multiple regression techniques, the levels of concern of residents living in the county selected as the site of a low level radioactive waste disposal facility (imminent threat condition) are compared with a statewide sample (hypothetical threat condition). Consistent with proponents' theoretical assumptions, the levels of concern are greater for respondents under conditions of imminent threat than of hypothetical threat. However, within the host county, levels of concern are lowest, albeit most polarized, in the community closest to the proposed site. A conflict theory approach enhances an understanding of these findings by suggesting that within the most proximate community levels of concern are lowest for citizens who stand to gain the most economic benefits from the facility but highest for those citizens who are least likely to derive tangible gains. 相似文献
73.
Schervish Paul G. Havens John J. 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2002,13(1):47-71
This paper describes the theoretical foundations, empirical findings, and practical and philosophical implications of the Boston Area Diary Study (BADS), a study of the caring behavior of 44 participants over one calendar year. In particular, the paper presents an identification theory of care and discusses how it shaped the conceptualization, collection, and analysis of the data in a year-long diary study of daily voluntary assistance. The findings from the BADS (1) theoretically confirm the identification theory of care; (2) methodologically capture how individuals perceive and carry out caring behavior as a unity; and (3rpar; empirically document the existence of a moral citizenship in America that is substantially more vigorous than is implied by the usual indicators of civic and political citizenship. 相似文献
74.
75.
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
76.
77.
UNDERSTANDING MAIL SURVEY RESPONSE BEHAVIOR A META-ANALYSIS 总被引:5,自引:0,他引:5
YAMMARINO FRANCIS J.; SKINNER STEVEN J.; CHILDERS TERRY L. 《Public opinion quarterly》1991,55(4):613-639
A meta-analysis of prior studies of techniques designed to inducemail survey response rates was conducted. Research encompassing184 effects (study outcomes) in 115 studies (articles) for 17predictors of response rate was examined. The average effectsize across all manipulations was r=.065, indicating an averageincrease of about 6.5 percent in response rates for manipulations.Effect sizes for specific predictors and two potential moderatorsof effects were examined. Results indicated that repeated contactsin the form of preliminary notification and follow-ups, appeals,inclusion of a return envelope, postage, and monetary incentives,were effective in increasing survey response rates. Significanteffect sizes for the predictors ranged from an increase in responseof 2 percent to 31 percent. Implications of the results forthe conduct of mail surveys and future research on mail surveyresponse behavior are discussed. 相似文献
78.
79.
To reduce nonresponse bias in sample surveys, a method of nonresponse weighting adjustment is often used which consists of multiplying the sampling weight of the respondent by the inverse of the estimated response probability. The authors examine the asymptotic properties of this estimator. They prove that it is generally more efficient than an estimator which uses the true response probability, provided that the parameters which govern this probability are estimated by maximum likelihood. The authors discuss variance estimation methods that account for the effect of using the estimated response probability; they compare their performances in a small simulation study. They also discuss extensions to the regression estimator. 相似文献
80.