Experience in public goods experiments

Theory and Decision - Using information on students’ past participation in economic experiments, we analyze whether behavior in public goods games is affected by experience (participation in...     

Bayesian inverse problems with heterogeneous variance

We consider inverse problems in Hilbert spaces under correlated Gaussian noise, and use a Bayesian approach to find their regularized solution. We focus on mildly ill-posed inverse problems with fractional noise, using a novel wavelet-based vaguelette–vaguelette approach. It allows us to apply sequence space methods without assuming that all operators are simultaneously diagonalizable. The results are proved for more general bases and covariance operators. Our primary aim is to study posterior contraction rate in such inverse problems over Sobolev classes and compare it to the derived minimax rate. Secondly, we study effect of plugging in a consistent estimator of variances in sequence space on the posterior contraction rate. This result is applied to the problem with error in forward operator. Thirdly, we show that empirical Bayes posterior distribution with a plugged-in maximum marginal likelihood estimator of the prior scale contracts at the optimal rate, adaptively, in the minimax sense.     

The implications of different ethnicity categorisation methods for understanding outcomes and developing policy in New Zealand

ABSTRACT

Identifying with more than one ethnicity is becoming increasingly common in New Zealand. It is therefore important that the methods of categorising ethnicity used by government agencies and researchers effectively account for diverse ethnic identities. The aim of this research was to assess the impact of using different methods of categorising ethnicity on understanding outcomes in New Zealand, using Census 2013 information about tobacco smoking among the population aged 15+ years as an illustration. Prioritised, total response and single/combination categorisation methods were compared. Prioritised and total response categorisation generally produced similar prevalence estimates and patterns for smoking status, although estimates diverged somewhat for Māori ethnic groups and to a lesser extent for Pacific Peoples and Asian ethnic groups. Single/combination categorisation indicated that combination ethnic groups tend to have smoking outcomes between those of the constituent groups. Categorisation method had a considerable impact on the size of some ethnic groups. Prioritised ethnicity categorisation may be inappropriate for use by government agencies and for policy-relevant research principally concerned with children, young people, Māori or Pacific Peoples. Single/combination categorisation is useful for understanding the associations between ethnicity and outcomes, however previous work suggests this method should be used with caution.     

“Take-the-Best” and Other Simple Strategies: Why and When they Work “Well” with Binary Cues

The effectiveness of decision rules depends on characteristics of both rules and environments. A theoretical analysis of environments specifies the relative predictive accuracies of the “take-the-best” heuristic (TTB) and other simple strategies for choices between two outcomes based on binary cues. We identify three factors: how cues are weighted; characteristics of choice sets; and error. In the absence of error and for cases involving from three to five binary cues, TTB is effective across many environments. However, hybrids of equal weights (EW) and TTB models are more effective as environments become more compensatory. As error in the environment increases, the predictive ability of all models is systematically degraded. Indeed, using the datasets of Gigerenzer et al. (1999, Simple Heuristics That Make Us Smart, New York: Oxford University Press), TTB and similar models do not predict much better than a naïve model that exploits dominance. Finally, we emphasize that the results reported here are conditional on binary cues.     

Poverty in Russia

This article concentrates on poverty debates during the last few years of the Soviet Union under Gorbachev and in Russia today under Yeltsin. Some references to previous years are made in order to provide some historical context for these debates. The article is divided into two parts: the first examines debates on the definitions of poverty, while the second looks at its depth and extent. The discussion will provide one more illustration of the now generally accepted thesis that the way poverty is defined inevitably affects the extent of measured poverty and the policy measures for its amelioration.     

Individual and Familial Correlates of Body Satisfaction in Male and Female College Students

Abstract

Objective: This study investigates the relative contributions of global self-esteem, body mass index (BMI), dieting behaviors, and perceived parental control and care on body satisfaction among a nonclinical sample of college students. Participants and Methods: Participants (49 males and 299 females) reported weight and height (to calculate BMI) and completed the EAT 26 test. Perceived parental care and control, global self-esteem, and body satisfaction were measured and examined in relation to BMI and dieting behavior. Results: High BMIs were associated with lower body satisfaction for both genders; dieting behavior, self-esteem, and perceived parental care and control demonstrated a unique gender-specific association among variables in prediction of body satisfaction and dieting behavior for each gender. Conclusions: Body satisfaction as a part of global self-esteem is constructed differently by males and females. Various aspects of parenting (care and control) are associated with self-esteem and body satisfaction for each gender, influencing dieting behavior.     

Negative Feelings and Help Seeking Among Older Adults With Chronic Conditions

Older adults with chronic conditions are at greater risk of negative affect, though few studies have focused on older adults’ perspectives on how chronic conditions affect their mental well-being. This study involved in-depth interviews that explored how older adults describe their feelings about chronic conditions, the context within which they experience these feelings, and their experiences with help-seeking for negative feelings. Participants reported that older adults experience a range of negative feelings related to their conditions and are only comfortable talking to people who understand their everyday experiences with managing chronic conditions. The findings have implications for health self-management.