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1.
Relations between grandmother and partner involvement (coresidence, social support, child care) and Puerto Rican adolescent mothers' parenting behaviors were examined. Few associations between grandmother involvement and behavior emerged, and these were moderated by coresidence. In contrast, partner involvement showed a number of significant (positive) direct and moderated relations with behavior. For both providers, the direction of the relations between social support and behavior during teaching was the opposite depending on coresidence: Greater social support was related to the display of more positive behavior among coresiding mothers but to less competent behavior among non‐coresiding mothers. The relations between child care support and behavior differed across providers. For grandmothers, greater child care was related to less positive behavior during teaching among coresiding mothers but to more competent behavior among non‐coresiding mothers. For partners, greater child care was more strongly related to positive behavior during play among non‐coresiding than coresiding mothers. Results are discussed in light of Latino cultural values, developmental issues, and implications for intervention.  相似文献   
2.
We consider nonparametric identification and estimation in a nonseparable model where a continuous regressor of interest is a known, deterministic, but kinked function of an observed assignment variable. We characterize a broad class of models in which a sharp “Regression Kink Design” (RKD or RK Design) identifies a readily interpretable treatment‐on‐the‐treated parameter (Florens, Heckman, Meghir, and Vytlacil (2008)). We also introduce a “fuzzy regression kink design” generalization that allows for omitted variables in the assignment rule, noncompliance, and certain types of measurement errors in the observed values of the assignment variable and the policy variable. Our identifying assumptions give rise to testable restrictions on the distributions of the assignment variable and predetermined covariates around the kink point, similar to the restrictions delivered by Lee (2008) for the regression discontinuity design. Using a kink in the unemployment benefit formula, we apply a fuzzy RKD to empirically estimate the effect of benefit rates on unemployment durations in Austria.  相似文献   
3.
Aggressive behavior has been well studied in terms of interindividual differences among aggressors and victims, but has been understudied, especially within naturalistic contexts, in terms of aggressor–victim relationships. The social relations model (SRM) is a powerful conceptual and analytic tool for studying dyadic phenomena, and we describe the use of multivariate SRM to study aggression. Boys and girls (N = 210) in middle schools (sixth and seventh grades) completed a newly created dyadic aggression and victimization inventory (DAVI). Results support the reliability and validity of the DAVI in assessing inter‐individual and inter‐dyadic differences in aggression and victimization. Occurrences of aggression were accounted for primarily by inter‐dyadic variability, indicating the importance of considering aggressor–victim relationships. We discuss the implications of this relationship focus for future research and intervention efforts.  相似文献   
4.
Micromoths can be challenging to identify based on morphology and are frequently omitted in assessments of moth diversity. However, their species richness and biology make them important components of terrestrial ecosystems. In this study we identified 1227 micromoths from a suburban garden at 63° north using DNA barcoding of Malaise trap samples. We recorded 78 different species with the 11 most abundant taxa accounting for 82 % of the catch. The remaining 67 species were represented by fewer than 14 specimens, but the number was often sufficient to provide a good idea of phenology. The larvae of these 78 species all feed on plants common in suburban environments. We show that when facilitated by identifications through DNA barcoding, Malaise traps provide interesting insights into the micromoth communities of suburban environments that might otherwise be overlooked. The use of Malaise traps is beneficial for investigations at high latitudes where light trapping is inefficient for sampling moths due to bright summer nights.  相似文献   
5.
This research examined social psychological aspects of nonviolent democratic transitions in Southeast Asia at the close of the 20th century. Researchers interviewed prodemocracy activists who participated in the Philippines' People's Power Revolution, Cambodia's Dhammayietra (Buddhist Walk for Peace), and East Timor's peace and liberation movement. Sets of open-ended vernacular questions were custom-built to fit each country's unique transition to democracy. In addition, the author used as a data source her personal experiences in the Philippines as a leader of street politics during People's Power. Findings show similar social psychological factors across all three politically-transformative episodes in Southeast Asia. Shared characteristics include a history of systemic violence, loosening up of the authoritarian regime, violence toward the prodemocracy activists, spiritual orientations of social commitments, networking-mobilizing skills used to confront an authoritarian state, building a social infrastructure to produce massive force, and conscientizing for active nonviolence .  相似文献   
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Data from Project TALENT were analyzed to investigate whether any long-term consequences exist for children of teenage parents. TALENT is a longitudinal national survey of 375,000 individuals who were in grades 9-12 in 1960. TALENT participants born when their mother and/or father was a teenager were compared with their classmates born when both parents were older on a variety of educational, occupational, and social dimensions. Many differences were found, owing primarily to the different social and economic background characteristics of the two groups. Even with the background factors controlled, the children of teenage parents, in comparison to their classmates: (a) showed decrements in terms of academic achievement; (b) were more likely to live in one-parent or stepparent homes; and (c)showed a slight tendency to repeat the early marriage, early parenthood, and higher fertility cycle of their parent(s).  相似文献   
8.
Data from a longitudinal study of Filipinos who were in graduate school in the U.S. in 1970 were analyzed to investigate why some students who as graduate students intended to return to the Philippines did return, while others failed to do so. There were no differences between the groups in terms of their migration-related attitudes and motivations as students, or in terms of their perceptions as students of relative economic and career opportunities in the Philippines and the U.S. Instead it was found that members of the two groups underwent different social experiences in the U.S. that caused the noncorresponders to change their original plans regarding return home. Youth, openness to American culture, and freedom to remain in the U.S. following the period of study were the primary antecedents of the change sequence.This research was supported by funds from Contract SCIRP-07031274-11 with the Select Commission on Immigration and Refugee Policy, and Grant HD-11938 from the National Institute of Child Health and Human Development. An earlier version of this paper was read at the Annual Meeting of the Western Psychological Association, Honolulu, Hawaii, May 1980.  相似文献   
9.
British Columbia’s treatment as prevention policy has provided free access to highly active antiretroviral therapy (HAART) to all HIV-positive provincial residents since 1996. One outcome is an increase in HIV-positive gay and bisexual men (GBM) with suppressed viral loads. Previous cross-sectional analyses indicated that some Vancouver GBM now recognize condomless anal sex with men on HAART who report a suppressed viral load as a seroadaptive strategy. To test the hypothesis that this new strategy, termed viral load sorting (VLS), is recognized and used among by GBM in the Momentum Health Study, we analyzed longitudinal data for HIV-negative/unknown (n = 556) and HIV-positive (= 218) serostatus participants. Analyses indicated that both groups reported VLS, and that serostatus and Treatment Optimism Scale scores were significant determinants in frequency and use. Results exemplify the medicalization of sex and Rogers’ Diffusion Of Preventative Innovations Model, and they have important implications for HIV research and GBM sexual decision-making.  相似文献   
10.
Women are less likely than men to graduate with a degree in science, technology, engineering, or math (STEM). We use detailed administrative data for a recent cohort of Ontario high school students, combined with data from the province's university admission system, to analyze the sources of this gap. We show that entry to STEM programs is mediated through an index of STEM readiness that depends on end‐of‐high school courses in math and science. Most of the gender gap in STEM entry can be traced to differences in the share of college entrants who are STEM‐ready; only a small share is attributable to differences in the choice of major conditional on readiness. We then use high school course data to decompose the gender gap in STEM readiness into two channels: one reflecting the gap in the fraction of high school students with the necessary prerequisites to enter STEM, the other arising from differences in the overall fractions of females and males who enter university. The gender gap in the fraction of males and females with STEM prerequisites is small. The primary driver of the gap in STEM readiness is the low rate of university entry by nonscience‐oriented males. (JEL I21, 28, I20)  相似文献   
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