Alcohol Use and Popularity: Social Payoffs From Conforming to Peers' Behavior

Although many economic analyses of adolescents have examined the costs of risky behaviors, few have investigated the gains that young people derive from such actions, particularly in terms of social payoffs for complying with peer behavior. This paper studies the relationship between adolescents' use of alcohol (relative to that of their peers) and popularity at school. We use data from the National Longitudinal Study of Adolescent Health, a rich and nationally representative survey with detailed information on social networks. Our findings suggest that adolescents are socially rewarded for conforming to their peers' alcohol use and penalized (to a lesser degree) for increasing their consumption above that of their peers. Male adolescents are rewarded for keeping up with their peers' drinking and for getting drunk. Female adolescents are rewarded for drinking per se, but not necessarily for keeping up with their peers. The results offer new information on peer influence and have implications for substance abuse interventions at school and in the community.     

Family Characteristics and Traumatic Consequences Associated with the Duration and Frequency of Sexual Assault

The objective of this study was to analyse the relationship between family characteristics and the trauma associated with the duration and frequency of sexual assault on child survivors in the state of Sabah, Malaysia. Eighty children who reported sexual assault through a one stop crisis centre in an urban hospital were studied. The main research instrument used was adapted from the trauma symptoms checklist for children. The results of the study show that there are significant differences between the symptoms of trauma of victims according to the frequency of sexual assault, but not according to its duration. Social workers need both to understand and to take note of the relationship of the variables of family characteristics, frequency of sexual assault and trauma effects on the victims in their intervention work with child sexual assault survivors who report having been abused. The implications of these findings are discussed in the context of providing crisis intervention by social workers in Malaysia for child victims of sexual assault.     

论民族主义史学的兴起与缺失(下)--从全球比较史学的角度考察

民族主义史学是近现代史学的主要潮流。自 17世纪从西方兴起以后 ,随着西方殖民主义的扩张而走向全球 ,至今不衰。对于非西方地区的史家而言 ,民族主义史学为他们抵御西方军事和文化的侵略 ,从事民族国家的建设 ,起了重要的作用。尽管如此 ,民族主义本身是西方历史与文化的产物 ,并不完全适用于解释中国和印度等地区的历史。因此 ,需要从比较史学的角度 ,以西方、东亚、伊斯兰和印度等地民族主义史学的发展特点为例 ,分析民族主义史学的共性 ,及其在近年所面临的挑战 ,以展望全球史学在未来的发展走向     

Structural Equations,Treatment Effects,and Econometric Policy Evaluation1

This paper uses the marginal treatment effect (MTE) to unify the nonparametric literature on treatment effects with the econometric literature on structural estimation using a nonparametric analog of a policy invariant parameter; to generate a variety of treatment effects from a common semiparametric functional form; to organize the literature on alternative estimators; and to explore what policy questions commonly used estimators in the treatment effect literature answer. A fundamental asymmetry intrinsic to the method of instrumental variables (IV) is noted. Recent advances in IV estimation allow for heterogeneity in responses but not in choices, and the method breaks down when both choice and response equations are heterogeneous in a general way.     

Dummy Endogenous Variables in Weakly Separable Models

In this paper, we consider the nonparametric identification and estimation of the average effect of a dummy endogenous regressor in models where the regressors are weakly but not additively separable from the error term. The model is not required to be strictly increasing in the error term, and the class of models considered includes limited dependent variable models such as discrete choice models. Conditions are established conditions under which it is possible to identify the average effect of the dummy endogenous regressor in a weakly separable model without relying on parametric functional form or distributional assumptions and without the use of large support conditions.     

Models of Cognition,the Contextualisation of Knowledge and Organisational Theory

This paper examines the importance of cognitivefoundations for theories of organisationalbehaviour. Three different conceptions of humancognition and reasoning are examined: theinformation processing, situated learning andcultural-historical perspectives. The papershows how each conception of cognition leads toa different understanding of organisationalroutines and organisational problem-solving, aswell as to the adoption of a differentempirical methodology for observingorganisational behaviour and for testinghypotheses about the nature of routines andproblem-solving. The paper demonstrates that ofthe three approaches to human cognition, onlythe cultural-historical one gives rise to anunderstanding of organisational knowledge asembedded within a wider cultural andinstitutional setting.