Two-Step Estimation of Incomplete Information Social Interaction Models With Sample Selection

ABSTRACT

This article considers linear social interaction models under incomplete information that allow for missing outcome data due to sample selection. For model estimation, assuming that each individual forms his/her belief about the other members’ outcomes based on rational expectations, we propose a two-step series nonlinear least squares estimator. Both the consistency and asymptotic normality of the estimator are established. As an empirical illustration, we apply the proposed model and method to National Longitudinal Study of Adolescent Health (Add Health) data to examine the impacts of friendship interactions on adolescents’ academic achievements. We provide empirical evidence that the interaction effects are important determinants of grade point average and that controlling for sample selection bias has certain impacts on the estimation results. Supplementary materials for this article are available online.     

Selecting significant effects in factorial designs: Lenth's method versus using negligible interactions

Among the many analytical techniques that have been published to analyze the significance of the effects in the absence of replications, two have emerged as the most widely used in text books as well as statistical software packages: The Lenth's method and the estimation of the variance of the effects from the values of those considered negligible. This article shows that neither is better than the other in all cases, and by analyzing the results obtained in a wide variety of situations it provides guidelines on when it is preferable to use one or the other technique.     

Engineering Identity: Gender and Professional Identity Negotiation among Women Engineers

This article considers how women in a gendered profession, engineering, construct their professional identity in response to workplace interpersonal interactions that marginalize it. Using data from interviews with women engineers, it also explores how these interactions influence the engineers' sense of self and belonging in engineering. The interpersonal interactions place professional identity on the periphery and can overly validate gender identity. I discuss two types of identity construction strategies employed by the participants in response to these marginalizing interactions: impression management tactics and coping strategies. Although the data demonstrate that participants may be left feeling devalued or ambivalent towards their identity or fit in engineering, some interactions are more validating and offer a sense of belonging. This article also reflects on how the engineers' actions may, in fact, represent forces for change in the gendered culture of engineering.     

The Developmental Progression of Transracial Experiences among South Korean Adoptees: A Review of the Literature

Thorough examination of the literature revealed no comprehensive reviews detailing the experiences of South Korean–U.S. adoptees as transnationally adopted persons. To address this need, multiple databases, keywords/keyword combinations, and fugitive literature were used. Data from the review were coded, categorized, and analyzed, with five themes emerging: (1) intrusive interactions, (2) boundary management, (3) discrimination and exclusion, (4) difficulties in identity development, and (5) ethnic exploration. These themes seem to fall along a developmental path from childhood through young adulthood. Understanding these experiences may be useful for formulating policy, structuring adoption services and clinical practice, and research design.     

Family Microtransitions: An Observational Study

This research aimed to study the processes that take place during family microtransitions, that is, when family members move from an interactive form characterized by specific roles (active or peripheral) to another form that requires a change in these roles. For this purpose, 21 normative triads composed of mother, father, and a 4-year-old child were observed in a laboratory while playing together in a setting where they were asked to change their interactive configuration three times. The data revealed different ways of family functioning in coping with the microtransitions. Two groups emerged from the analysis that presented different characteristics. In particular, the family triads that completed the assigned task showed a significantly higher level of coordination and emotional tuning, a larger number of processes implied in the triadic dynamics, and a greater communicative coherence between the verbal, the expressive, and the corporal channels, compared with the group that did not complete the task.     

Pregnant Bodies in Social Context: Natural,Disruptive, and Unrecognized Pregnancy

This article examines the role of social context in the construction of meanings attached to the pregnant body. Analyzing interviews with 42 women who, during the time of the interview, were either pregnant or had given birth to a child within the last 12 months, I explore (1) the role of social context in assigning social value to the pregnant body; and (2) how the meaning attached to pregnancy changes as pregnant women move from one social context to another. I suggest that the role of social context is central to our understanding of how pregnant women are perceived and evaluated by others.     

Work Productivity as a Function of the Percentage of Monetary Incentives to Base Pay

In many individual monetary incentive systems workers receive an hourly base pay and can earn incentives when productivity exceeds a specified standard. The total amount that can be earned in incentives is often expressed as a percentage of base pay. This study examined the effects of different percentages of incentive pay to base pay on work productivity. Seventy-five college students were randomly assigned to one of five incentivebase pay conditions: 0% (no incentives), l0%, 30%. 60% or 100%. Subjects participated in 15 forty-five minute sessions during which they assem: bled parts made from bolts, nuts and washers. Subjects received a base pay amount for assembling a minimum of 50 quality parts per session and a per piece incentive for parts over 50. If subjects assernbled 120 quality parts, the production maximum, the total amount they could earn in incentives equaled 0%, l0%, 30%, 60% or 100% of their base pay. Results indicated that the productivity of subjects in the l0%, 30%, 60% and 100% groups was significantly greater than that of subjects in the 0% incentive group; however, the productivity of subjects in the l0%, 30%, 60% and 100% incentive groups did not differ.     

康德哲学与现代性论争

康德的批判哲学是当今现代性论争的焦点之一。现代性重建派只强调康德哲学中的知性立法的一面 ,而忽视了理性的规范作用。后现代主义则与之相反。其实 ,双方都歪曲了康德有关知性立法和理性规范的论述的本意。康德是要指出知性立法和理性规范是相互制衡的 ,也即互相渗透和互为解放力量的。因而 ,现代性危机的原因不在于现代社会的工具理性化 ,这只是表面现象 ,而在于知性立法和理性规范之间互相制衡的机制遭到了破坏     

Trajectory of quality of mother-child interactions: Prospective links with child socioemotional functioning

Research shows that the quality of mother-child interactions is a robust antecedent of child socioemotional functioning. Yet, relatively little is known about the evolution of this relational quality over time, and even less about how changes in relational quality may bear on child adjustment. This study aimed to describe the trajectory of quality of mother-child interactions between ages 2 and 7 and to investigate associations between individual differences in this trajectory and child socioemotional functioning at age 8. In a sample of 233 mother-child dyads primarily comprised of White French-Canadian mothers, the quality of interactions was assessed during 10-min play sequences when children were aged 2, 4, and 7 years. Child internalizing, externalizing, and prosocial behaviors were reported by a subsample of 171 teachers at age 8. The results showed that on average, quality of mother-child interactions decreased over time. In terms of individual differences, children who experienced a slower decrease in the quality of interactions with their mother from 2 to 7 years showed less internalizing behavior at age 8, over and above initial quality at 2 years. Children involved in higher quality interactions with their mother at 2 years showed more prosocial and less externalizing behavior at age 8, independent of the subsequent decrease in the quality of those interactions. The findings suggest that initial levels and subsequent changes in the quality of mother-child interactions are two distinct indicators of their relationship with potentially different implications for child adjustment.     

New neighbours in a time of change: local pragmatics and the perception of asylum centres in rural Denmark

Asylum centres in rural areas are an increasingly common mode of managing asylum seekers in Denmark. These centres’ arrival occurs in a context of protracted rural crisis, as demographic and economic changes reshape local communities. Yet research on these processes remains scarce, issues concerning asylum and the rural being seldom conceived together. At the same time, majority population attitudes towards refugees are often depicted through the opposed poles of xenophobia and humanitarianism. Based on ethnographic research, this article examines the meanings and consequences of asylum centres for rural Danish communities. Drawing on anthropological theory on the mutuality of social life we argue that asylum centres become embedded in pre-existing relations within local communities and between them and the centralising Danish welfare state. Local communities sometimes were initially sceptical about asylum centres, but they generally developed a collective, pragmatic approach towards them in contrast to the divided, ideological cast of national debates on asylum. By shifting focus from the national to the local, from the urban to the rural, and from the migrants to the neighbouring communities, a less polarising and more everyday mode of relating to the arrival of asylum seekers becomes visible.