全文获取类型
收费全文 | 8345篇 |
免费 | 179篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1310篇 |
民族学 | 24篇 |
人才学 | 4篇 |
人口学 | 771篇 |
丛书文集 | 26篇 |
教育普及 | 2篇 |
理论方法论 | 724篇 |
综合类 | 97篇 |
社会学 | 4199篇 |
统计学 | 1369篇 |
出版年
2020年 | 102篇 |
2019年 | 133篇 |
2018年 | 156篇 |
2017年 | 176篇 |
2016年 | 169篇 |
2015年 | 118篇 |
2014年 | 168篇 |
2013年 | 1421篇 |
2012年 | 200篇 |
2011年 | 218篇 |
2010年 | 172篇 |
2009年 | 160篇 |
2008年 | 203篇 |
2007年 | 188篇 |
2006年 | 202篇 |
2005年 | 191篇 |
2004年 | 165篇 |
2003年 | 136篇 |
2002年 | 166篇 |
2001年 | 161篇 |
2000年 | 184篇 |
1999年 | 150篇 |
1998年 | 150篇 |
1997年 | 124篇 |
1996年 | 135篇 |
1995年 | 137篇 |
1994年 | 150篇 |
1993年 | 137篇 |
1992年 | 146篇 |
1991年 | 159篇 |
1990年 | 176篇 |
1989年 | 154篇 |
1988年 | 163篇 |
1987年 | 140篇 |
1986年 | 141篇 |
1985年 | 141篇 |
1984年 | 160篇 |
1983年 | 140篇 |
1982年 | 105篇 |
1981年 | 89篇 |
1980年 | 98篇 |
1979年 | 119篇 |
1978年 | 94篇 |
1977年 | 74篇 |
1976年 | 87篇 |
1975年 | 60篇 |
1974年 | 78篇 |
1973年 | 56篇 |
1971年 | 46篇 |
1970年 | 48篇 |
排序方式: 共有8526条查询结果,搜索用时 15 毫秒
51.
Gallup macropartisanship varies more over time than aggregatemeasures of partisanship employing the standard Michigan SurveyResearch Center (SRC) party identification measure, but previousanalyses do not provide direct evidence about why Gallup macropartisanshipis more variable. Although these differences could result fromthe short-term focus of the Gallup party affiliation question,aggregate-level analyses cannot test the effects of questionwording directly. Between March and October 1992, we conducteda series of question-wording experiments, employing six statewidecomputer-assisted telephone interview (CATI) surveys of Michiganadults, including a four-wave panel study. Our analyses stronglysuggest that the Gallup measure responds more to short-termpolitical conditions and clearly demonstrate that the Gallupmeasure is less stable over time. These individual-level resultshelp explain why Gallup macropartisanship varies more over timethan aggregate measures of partisanship employing the standardSRC measure and raise questions about the degree to which onecan generalize from analyses using the Gallup data to the researchliterature on party identification. 相似文献
52.
Peltzman [Peltzman, S., 1984. Constituent interest and congressional voting. Journal of Law and Economics 27, 181–210] argues that if constituents’ economic interests have well-defined “winners and losers” and are appropriately measured, then constituents’ economic interests, and not legislator ideology, are the most important determinates of legislator voting. We test Peltzman's theory by examining senatorial voting on three mandated spending limitation bills. We find, consistent with Peltzman's theory, that the ratio of federal spending in a senator's state to federal taxes paid by that state, and not a senator's personal ideology, matters on legislation where there are well-defined economic “winners and losers.” This is particularly important because unlike other constituents’ economic interest measures that only impact a fraction of the constituency, the ratio of federal spending to federal taxes in a state represents the economic interests of all the constituents in a state. 相似文献
53.
We present a case study based on a depression study that will illustrate the use of Bayesian statistics in the economic evaluation of cost‐effectiveness data, demonstrate the benefits of the Bayesian approach (whilst honestly recognizing any deficiencies) with respect to frequentist methods, and provide details of using the methods, including computer code where appropriate. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
54.
Recent social changes have made husbands' emotional investments and wives' perceptions of equity in the division of housework crucial for women's marital happiness. But wives are also happiest in their marriages when they share a strong normative commitment to lifelong marriage with their husbands and when their husbands take the lead in breadwinning. Thus our research suggests that elements of the new and the old promote marital happiness among contemporary wives. 相似文献
55.
W. Bennett 《Information, Communication & Society》2003,6(2):143-168
Many observers doubt the capacity of digital media to change the political game. The rise of a transnational activism that is aimed beyond states and directly at corporations, trade and development regimes offers a fruitful area for understanding how communication practices can help create a new politics. The Internet is implicated in the new global activism far beyond merely reducing the costs of communication, or transcending the geographical and temporal barriers associated with other communication media. Various uses of the Internet and digital media facilitate the loosely structured networks, the weak identity ties, and the patterns of issue and demonstration organizing that define a new global protest politics. Analysis of various cases shows how digital network configurations can facilitate: permanent campaigns; the growth of broad networks despite relatively weak social identity and ideology ties; transformation of individual member organizations and whole networks; and the capacity to communicate messages from desktops to television screens. The same qualities that make these communication-based politics durable also make them vulnerable to problems of control, decision-making and collective identity. 相似文献
56.
OGBURN WF 《AJS; American journal of sociology》1948,53(6):474-476
57.
There are many models that require the estimation of a set of ordered parameters. For example, multivariate analysis of variance often is formulated as testing for the equality of the parameters versus an ordered alternative. This problem, referred to as isotonic inference, constrained inference, or isotonic regression, has led to the development of general solutions, not often easy to apply in special models. In this expository paper, we study the special case of a separable convex quadratic programming problem for which the optimality conditions lead to a readily solved linear complementarity problem in the Lagrange multipliers, and subsequently to an equivalent linear programming problem, whose solution can be used to recover the solution of the original isotonic problem. The method can be applied to estimating ordered correlations, ordered binomial probabilities, ordered Poisson parameters, ordered exponential scale parameters, or ordered risk differences. 相似文献
58.
Yen Steven T. Douglass Shaw W. Eiswerth Mark E. 《Review of Economics of the Household》2004,2(1):73-88
Asthma patients' health status may be especially sensitive to some types of air pollution, but the evidence on this is mixed. We explore the effects of ground-level ozone on asthma patient's activities, breaking apart the usual aggregated category of leisure into indoor and outdoor activities, and differentiating those by whether the activities were active or inactive. Applying the semiparametric censored estimation method we demonstrate that even though the period over which activities were observed was relatively low in ozone levels, there is a significant impact of ozone on a few activities. The (non-ozone) economic and demographic variables in the model play significant roles in explaining the allocation of time among seven activities, suggesting the suitability of the approach for other household decision-making contexts. 相似文献
59.
The risky business of insurance pricing 总被引:1,自引:1,他引:0
W. Kip Viscusi 《Journal of Risk and Uncertainty》1993,7(1):117-139
The factors influencing insurance pricing decisions are assessed using the ISO product liability ratemaking files for 1980–1984. The mean loss level has a strong positive effect on manual rates and premium rates/exposure. Evidence on a variety of ambiguity measures is more mixed. As a broad generalization, risk ambiguity lowers manual rates, which may reflect exclusion of large loss outliers as being unrepresentative. Risk ambiguity tends to have a positive effect on actual pricing decisions for particular policies, especially bodily injury lines and the interactive risk-ambiguity model. 相似文献
60.
Squared residual autocorrelations have been found useful in detecting departures from linearity in time series models. This is especially the case with data exhibiting heterogeneity in variances. A rank test is proposed which is much more robust than its parametric counterpart. 相似文献