首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   8789篇
  免费   25篇
各国政治   239篇
工人农民   1116篇
世界政治   313篇
外交国际关系   298篇
法律   4903篇
中国政治   4篇
政治理论   1939篇
综合类   2篇
  2022年   2篇
  2021年   8篇
  2020年   6篇
  2019年   16篇
  2018年   1288篇
  2017年   1215篇
  2016年   1030篇
  2015年   71篇
  2014年   37篇
  2013年   83篇
  2012年   206篇
  2011年   927篇
  2010年   1019篇
  2009年   593篇
  2008年   753篇
  2007年   710篇
  2006年   55篇
  2005年   110篇
  2004年   195篇
  2003年   173篇
  2002年   67篇
  2001年   13篇
  2000年   17篇
  1999年   9篇
  1998年   14篇
  1997年   18篇
  1996年   28篇
  1995年   36篇
  1994年   29篇
  1993年   6篇
  1992年   2篇
  1991年   1篇
  1990年   4篇
  1989年   9篇
  1988年   2篇
  1987年   1篇
  1986年   2篇
  1985年   2篇
  1984年   11篇
  1983年   12篇
  1982年   6篇
  1980年   2篇
  1979年   5篇
  1978年   7篇
  1977年   9篇
  1976年   1篇
  1975年   1篇
  1974年   1篇
  1973年   1篇
  1967年   1篇
排序方式: 共有8814条查询结果,搜索用时 15 毫秒
891.
Symbolic racism (SR) has attracted critique and controversy. One controversy that has remained unresolved is the function of SR. SR theorists suggest that SR originates from Black individualism and represents a new form of racism. Others suggest that SR originates in opposition to equality and serves to legitimize these socially inappropriate attitudes. The current paper argues that SR can arise from both Black individualism and anti-equality attitudes, thus serving both as a new expression of racism but also as a legitimizing ideology. A preliminary test of this hybrid model was examined with survey data from a community and university sample. Results suggest that a hybrid model of the underpinnings of SR explains more variance in SR than either the Black individualism or legitimizing ideology models. Furthermore, SR mediated the relationships between both anti-equality attitudes and Black individualism on opposition to affirmative action policy and diversity in work and education settings.  相似文献   
892.
Prior research has provided substantial evidence that child maltreatment and exposure to physical intimate partner violence (IPV) are associated with increased externalizing behavior problems among children and adolescents. However, little is known about the effects of exposure to psychological IPV and exposure to the physical abuse of a sibling. Using a total sample (N = 2,572) and subsample (n = 441) of children ages 3–18 years old, the purpose of this study was to assess whether cumulative types of family violence lead to higher mean externalizing behavior scores and to examine the effects of single types of indirect and direct family violence on children’s mean externalizing behavior scores. Results confirmed that children who experienced any type of family violence victimization had higher mean externalizing behavior scores compared to children with no history of family violence; however, few differences in externalizing behavior scores were found as the number of family violence types increased. Children who experienced indirect types of family violence (e.g., exposure to the physical abuse of a sibling) had higher externalizing behavior scores than children who experienced direct maltreatment (e.g., child physical abuse). Findings from this study suggest that researchers and service providers should adopt a broader conceptualization of family violence victimization and increase the amount of services provided to children who are indirectly victimized.  相似文献   
893.
Limited information is available about the international generalizability of the common conclusion that marital discord tends to be associated with problematic parenting. Pakistan is a sociocultural context known for a high frequency of marital distress. Accordingly, this study draws from a sample of 270 Pakistani families with children between the ages of 9 to 13 years (M?=?11.21 years). In this study we explore the question: Are Pakistani children’s perceptions of maternal and/or paternal rejection related to their parents’ perceptions of spousal rejection? Results of a hierarchical multiple regression analyses showed that wives’ perceptions of husbands’ rejection predicted children’s perceptions of maternal rejection, as well as—but to a significantly lesser extent—children’s perceptions of paternal rejection. Similarly, husbands’ perceptions of wives’ rejection predicted children’s perceptions of paternal rejection, as well as—but to a significantly lesser extent—children’s perceptions of maternal rejection. Results of this research, along with the slim body of prior international research, suggests that the concept of “spillover effect” used to explain the association between spousal rejection and parental rejection may have widespread international applicability.  相似文献   
894.
Despite financial innovations that have created important new substitutes for cash usage, per capita holdings of U.S. currency amount to $2950. Yet American households and businesses admit to holding only 15% of the currency stock, leaving the whereabouts of 85% unknown. Some fraction of this unaccounted for currency is held abroad (the dollarization hypothesis) and some is held domestically undeclared, as a store of value and a medium of exchange for transactions involving the production and distribution of illegal goods and services, and for transactions earning income that is not reported to the IRS (the unreported economy hypothesis). We find that the percentage of U.S. currency currently held overseas is between 30 and 37% rather than the widely cited figure of 65%. This finding is based on the official Federal Reserve/Bureau of Economic Analysis data which is a proxy measure of the New York Federal Reserve’s (NYB) “confidential” data on wholesale currency shipments abroad. We recommend that the NYB data be aggregated so as to circumvent confidentiality concerns, and be made readily available to all researchers in order to shed greater light on the questions of how much U.S. currency is abroad and on the particular location of overseas U.S. dollars. The newly revised official estimates of overseas currency holdings are employed to determine the Federal Reserve’s seigniorage earnings from 1964–2010, which have provided a $2950. Yet American households and businesses admit to holding only 15% of the currency stock, leaving the whereabouts of 85% unknown. Some fraction of this unaccounted for currency is held abroad (the dollarization hypothesis) and some is held domestically undeclared, as a store of value and a medium of exchange for transactions involving the production and distribution of illegal goods and services, and for transactions earning income that is not reported to the IRS (the unreported economy hypothesis). We find that the percentage of U.S. currency currently held overseas is between 30 and 37% rather than the widely cited figure of 65%. This finding is based on the official Federal Reserve/Bureau of Economic Analysis data which is a proxy measure of the New York Federal Reserve’s (NYB) “confidential” data on wholesale currency shipments abroad. We recommend that the NYB data be aggregated so as to circumvent confidentiality concerns, and be made readily available to all researchers in order to shed greater light on the questions of how much U.S. currency is abroad and on the particular location of overseas U.S. dollars. The newly revised official estimates of overseas currency holdings are employed to determine the Federal Reserve’s seigniorage earnings from 1964–2010, which have provided a 287 billion windfall for U.S. taxpayers. Overseas currency stock data are also used to derive estimates of the domestically held stock of currency as well as narrow and broad measures of domestic monetary aggregates. These domestic monetary aggregates are believed to be better predictors of future economic activity than traditional monetary aggregates and are tested to determine their ability to predict fluctuations in real output and prices. Domestic cash holdings are finally used to estimate the size of the U.S. unreported economy as measured by the amount of income that is not properly reported to the IRS. By 2010, we estimate that legal and illegal source unreported income” is $1.9–$1.9–2.4 trillion, implying a “tax gap” in the range of $400–$400–540 billion. Currently, we estimate that 18–23% of total reportable income is not properly reported to the IRS.  相似文献   
895.
Based on ethnographic data, this essay analyzes the social order properties of a poor urban street, in a small city in the northeast United States, on which drug dealing is the principle occupation. Rather than treating drug dealing as an agent of disorder, we focus on the order properties of drug dealing and the ordered character of the local code of conduct that develops around it. Like Sudhir Venkatesh (American Journal of Sociology 103:82–111, 1997) we examine the interface between drug dealing and the neighborhood. However, in this small urban space the drug dealers are not outsiders, rather, they are long term residents: established insiders who are well integrated into community life. As such their work practices and the requirements they place on behavior in public spaces impact the neighborhood in comprehensive ways. We detail the phenomenon Elijah Anderson called the “code of the street” (Anderson 1999) as a set of practices and social markers, a local Interaction Order (Goffman, American Sociological Review 48:1–17, 1983; Rawls, Sociological Theory 2:136–149, 1987), that furnishes basic day to day sensemaking tools for residents (Rawls 2009). We propose that this order has a constitutive character that furnishes stable expectations (Garfinkel 1963, 1967) for meaningful social action and identity in the neighborhood. In a context of industrial decline and urban poverty, drug dealing careers constitute a major socialization factor, that touches everyone here—especially children.  相似文献   
896.
Studies suggest that stalking victimization may have a serious mental health impact. The present article investigates gender differences in mental health and possible mediating effects of stalking victimization in a community sample. The study includes a postal survey of 665 German community residents on the experience of stalking and various mental health indicators. In a majority of mental health scales, women score poorer than men, and a higher percentage of women fulfill criteria for a current mental disorder and used psychotropic medication. However, effects of gender decrease to a nonsignificant level when stalking victimization is entered into the respective models. Furthermore, associations of stalking victimization with poor mental health, psychosocial functioning, and use of medication are largely comparable across gender.  相似文献   
897.
This study investigates the factors that shape the attitudes of scientists toward starting their own business or working in a private sector firm. The analysis is based on data collected from scientists working in the German Max Planck Society, a research institution devoted to basic science. We find that the scientists’ attractiveness of working in a private sector firm or of starting their own business differ considerably according to their academic discipline and the self-reported commercial potential of their research. The ability to take risks, prior work experience in private firms, and personal experience in cooperating with industry lead to a positive attitude towards switching to private sector employment or entrepreneurship. Strong willingness to freely distribute research findings is related to a low appeal of private sector work.  相似文献   
898.
899.
Traditional methods of volatile detection used by police typically consist of reliance on canine olfaction. However, dogs have some limitations such as cost of training and time of conditioning. The possibility of using parasitic wasps for detecting explosives and narcotics has been developed. Moreover, wasps are cheap to produce and can be conditioned with impressive speed for a specific chemical detection task. We examined the ability of Nasonia vitripennis Walker to learn and respond to methyldisulfanylmethane (DMDS), a volatile discriminator of cadaver. The training aimed to form an association between an unconditioned stimulus (pupae) and the conditioned stimulus (odor source). After the training, the time spent by conditioned wasps in the DMDS chamber was measured. Statistical analysis showed that the increasing concentrations involved an increase in the time spent in the chamber containing DMDS. This study indicates that N. vitripennis can respond to DMDS, which provide further support for its development as a biological sensor.  相似文献   
900.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号