Contingencies of Self‐worth in Early Adolescence: The Antecedent Role of Perceived Parenting

Contingent self‐esteem (i.e., the degree to which one's self‐esteem is dependent on meeting particular conditions) has been shown to predict a wide range of psychosocial and academic problems. This study extends previous research on contingent self‐esteem by examining the predictive role of perceived parenting dimensions in a sample of early adolescents (N = 240; age range 11–15 years). Additionally, the effect of perceived parenting on contingent self‐esteem is compared with its effect on global self‐esteem. Our main findings showed that both responsiveness and psychological control were unique predictors of global self‐esteem whereas only psychological control uniquely predicted contingent self‐esteem. Although the effect of responsiveness on global self‐esteem was increased when combined with high levels of behavioral control, this effect did not depend on the level of psychological control. The effect of psychological control on contingent self‐esteem, however, generally increased when combined with high levels of responsiveness.     

High-dimensional VAR with low-rank transition

Statistics and Computing - We propose a vector auto-regressive model with a low-rank constraint on the transition matrix. This model is well suited to predict high-dimensional series that are...     

LASSO-type estimators for semiparametric nonlinear mixed-effects models estimation

Parametric nonlinear mixed effects models (NLMEs) are now widely used in biometrical studies, especially in pharmacokinetics research and HIV dynamics models, due to, among other aspects, the computational advances achieved during the last years. However, this kind of models may not be flexible enough for complex longitudinal data analysis. Semiparametric NLMEs (SNMMs) have been proposed as an extension of NLMEs. These models are a good compromise and retain nice features of both parametric and nonparametric models resulting in more flexible models than standard parametric NLMEs. However, SNMMs are complex models for which estimation still remains a challenge. Previous estimation procedures are based on a combination of log-likelihood approximation methods for parametric estimation and smoothing splines techniques for nonparametric estimation. In this work, we propose new estimation strategies in SNMMs. On the one hand, we use the Stochastic Approximation version of EM algorithm (SAEM) to obtain exact ML and REML estimates of the fixed effects and variance components. On the other hand, we propose a LASSO-type method to estimate the unknown nonlinear function. We derive oracle inequalities for this nonparametric estimator. We combine the two approaches in a general estimation procedure that we illustrate with simulations and through the analysis of a real data set of price evolution in on-line auctions.     

Strategic, sincere, and heuristic voting under four election rules: an experimental study

We report on laboratory experiments on voting. In a setting where subjects have single-peaked preferences, we find that the rational choice theory provides very good predictions of actual individual behavior in one-round and approval voting elections but fares poorly in explaining vote choice under two-round elections. We conclude that voters behave strategically as far as strategic computations are not too demanding, in which case they rely on simple heuristics (under two-round voting) or they just vote sincerely (under single transferable vote).     

Immigration and Natives’ Attitudes towards the Welfare State: Evidence from the European Social Survey

Does immigration reduce natives’ support for the welfare state? Evidence from the European Social Survey (2002/2003) suggests a more qualified relation. For Europe as a whole, there is only weak evidence of a negative association between the perceived presence of immigrants and natives’ support for the welfare state. However, this weak average relationship masks considerable heterogeneity across countries. We distinguish two channels through which immigration could affect natives’ support for the welfare state: a pure dislike of immigrants and concerns about the economic consequences of immigration. We find that natives who hold both negative views react much more negatively to a given perceived share of immigrants than natives who hold neither view. However, there is no clear pattern concerning the relative importance of the two channels. Finally, we find that natives who hold either of these negative views of immigrants tend to be less supportive of the welfare state independently of the perceived presence of immigrants.     

Does any mother’s body odor stimulate interest in mother’s face in 4‐month‐old infants?

Little is known about the effects of olfaction on visual processing during infancy. We investigated whether and how an infant's own mother's body odor or another mother's body odor affects 4‐month‐old infants’ looking at their mother's face when it is paired with a stranger's face. In Experiment 1, infants were exposed to their mother's body odor or to a control odor, while in Experiment 2, infants were exposed to a stranger mother's body odor while their visual preferences were recorded. Results revealed that infants looked more at the stranger's female face in presence of the control odor but that they looked more at their mother's face in the context of any mother's body odors. This effect was due to a reduction of looking at the stranger's face. These findings suggest that infants react similarly to the body odor of any mother and add to the growing body of evidence indicating that olfactory stimulation represents a pervasive aspect of infant multisensory perception.     

Characteristics of Sexually Abused Children and Their Nonoffending Mothers Followed by Child Welfare Services: The Role of a Maternal History of Child Sexual Abuse

Considering the importance of mother’s support in the adaptation of a sexually abused child, it is relevant to determine if the mothers and children involved in an intergenerational cycle of child sexual victimization differ from dyads in which only the child has been abused. The purpose of this study was to compare mother–child dyads with sexually abused children according to whether the mother had herself been victim of child sexual abuse. The sample included 87 dyads with sexually abused children aged 3–18 years old and their mothers (44 reporting maternal and child abuse), followed by social welfare services of the province of Quebec (Canada). The two groups of mothers were compared on their past family abuse experiences and past family relations, their mental health history, their current psychological distress, their parenting behaviors, and their current levels of family functioning. Children were compared on their adaptation. Multivariate analyses indicated that mothers reporting child sexual abuse were more likely to report more other maltreatments in their childhood and greater prevalence of lifetime history of alcohol abuse disorders, dysthymia, and panic disorder compared with mothers who had not experienced CSA. Compared to children whose mothers had not experienced CSA, those whose mothers had experienced CSA showed higher rates of problems behaviors and were more likely to report having been sexually abused by a trusted person. These results highlight the specific clinical needs for the assessment and treatment for sexually abused children whose mothers experienced child sexual abuse.     

FACTOR AUGMENTATION,FACTOR ELIMINATION,AND ECONOMIC GROWTH

Economic growth theory distinguishes between reproducible and nonreproducible factors of production. In traditional growth models based on factor‐augmenting technical change, perpetual economic growth requires that each essential nonreproducible factor, such as labor, be augmented by a reproducible factor, such as human capital. Recent models of factor‐eliminating technical change deliver perpetual growth by eliminating the nonreproducible factors. Heretofore, the literature has kept factor augmentation and factor elimination separate. We analyze a model with both. The model generalizes the traditional factor augmentation approach by relaxing the usual restriction that factor elimination is absent. We obtain the striking result that factor‐augmenting technical change is a misspecification when factor‐eliminating technical change is present. The result raises several questions about technical change and endogenous growth. (JEL O41, O31, O33)