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Objective. This article examines the effects of residential mobility on social connections that are likely to affect children's well‐being. Methods. We use data from a survey of participants in a housing experiment in Los Angeles, California to examine whether families that moved from public housing projects to other neighborhoods suffered short‐term losses of social capital. Results. Results indicate that residential mobility is associated with a reduced likelihood of parents talking with the parents of their children's friends. However, the effects of residential mobility on social capital are sensitive to adjustments for poverty levels in destination neighborhoods and factors that influence the probability of moving. Conclusions. Our results suggest that at least some of the negative effects of moving shown in previous studies may be due to negative selection. That is, families that move may be less successful at developing social ties than families that do not move. This finding suggests that future research on residential mobility needs to pay closer attention to factors that influence why and where families move.  相似文献   
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ABSTRACT The analysis of a set of data consisting of N short (≤20 observations each) multivariate time series, where the observations are irregularly spaced and where observations for the different components of each multivariate series are observed at different times, is discussed. With the increased use of automatic recording devices in many fields, data such as these, which are of course samples from smooth response curves, are becoming more common. In this application, which was a clinical trial comparing two cements for use in hip replacement surgery, the key to the analysis was in recognizing that the interest lay in the degree to which the five curves representing a patient's vital signs deviated from baseline (i.e., normal for that patient) during surgery. This enabled the statisticians to define appropriate response variables. The analysis included Rosseeuw's (1984) technique for the identification of multivariate outliers and logistic regressions to identify any effects on the process producing the outliers due to treatment or covariates.  相似文献   
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Alternative ways of using Monte Carlo methods to implement a Cox-type test for separate families of hypotheses are considered. Monte Carlo experiments are designed to compare the finite sample performances of Pesaran and Pesaran's test, a RESET test, and two Monte Carlo hypothesis test procedures. One of the Monte Carlo tests is based on the distribution of the log-likelihood ratio and the other is based on an asymptotically pivotal statistic. The Monte Carlo results provide strong evidence that the size of the Pesaran and Pesaran test is generally incorrect, except for very large sample sizes. The RESET test has lower power than the other tests. The two Monte Carlo tests perform equally well for all sample sizes and are both clearly preferred to the Pesaran and Pesaran test, even in large samples. Since the Monte Carlo test based on the log-likelihood ratio is the simplest to calculate, we recommend using it.  相似文献   
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A parallel is posited between the ways hybridity and kinship are thought about in Western contexts, challenging the idea that kinship and biology tend to lead to narrow, roots-oriented, essentialized definitions of identity. Rather than being the opposite of rhizomic, diasporic hybridity, kinship and biology partake of the tension between roots and routes that is characteristic of all hybridity. Anthropological evidence on the character of Western kinship thinking is examined to elucidate some features of its flexibility. Theories of hybridity are seen as being themselves a type of kinship thinking.  相似文献   
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While scientists across the academy have abandoned the nature/nurture dichotomy, evidence for the influences of society on our biology is greater than ever. This article reviews new developments in the biological sciences – in the sub‐fields of genetics, hormones, and neuroscience – with special attention to the implications for sociologists interested in gender. The article closes with an argument that embracing these developments has both theoretical and methodological promise and can enhance rather than harm research and activism regarding gender equality and other social hierarchies.  相似文献   
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The main objective of this study was to extend previous research in the area of longitudinal marital satisfaction by examining how marital issues, including decision-making, activities, affection, conflict, financial matters, stability, and values, changed over the first 5 years of marriage for 242 Utah, Latter-Day-Saint individuals. In addition, this study examined whether change occurs differently for husbands versus wives and for at-risk individuals versus non-risk individuals. The results showed that four marital issues worsened over time (activities, affection, conflict, and stability). Two of the six subscales (activities and affection) were found to differ significantly by gender. In addition, four subscales were significantly different for at-risk couples when compared with non-risk couples (decision-making, activities, conflict, and stability). Limitations and recommendations are discussed.  相似文献   
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We document racial/ethnic and nativity differences in U.S. smoking patterns among adolescents and young adults using the 2006 Tobacco Use Supplement to the Current Population Survey (n = 44,202). Stratifying the sample by nativity status within five racial/ethnic groups (Asian American, Mexican–American, other Hispanic, non-Hispanic black, and non-Hispanic white), and further by sex and age, we compare self-reports of lifetime smoking across groups. U.S.-born non-Hispanic whites, particularly men, report smoking more than individuals in other racial/ethnic/nativity groups. Some groups of young women (e.g., foreign-born and U.S.-born Asian Americans, foreign-born and U.S.-born Mexican–Americans, and foreign-born blacks) report extremely low levels of smoking. Foreign-born females in all of the 25–34 year old racial/ethnic groups exhibit greater proportions of never smoking than their U.S.-born counterparts. Heavy/moderate and light/intermittent smoking is generally higher in the older age group among U.S.-born males and females, whereas smoking among the foreign-born of both sexes is low at younger ages and remains low at older ages. Taken together, these findings highlight the importance of considering both race/ethnicity and nativity in assessments of smoking patterns and in strategies to reduce overall U.S. smoking prevalence and smoking-attributable health disparities.  相似文献   
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