Learning from a lot: Empirical Bayes for high‐dimensional model‐based prediction

Empirical Bayes is a versatile approach to “learn from a lot” in two ways: first, from a large number of variables and, second, from a potentially large amount of prior information, for example, stored in public repositories. We review applications of a variety of empirical Bayes methods to several well‐known model‐based prediction methods, including penalized regression, linear discriminant analysis, and Bayesian models with sparse or dense priors. We discuss “formal” empirical Bayes methods that maximize the marginal likelihood but also more informal approaches based on other data summaries. We contrast empirical Bayes to cross‐validation and full Bayes and discuss hybrid approaches. To study the relation between the quality of an empirical Bayes estimator and p, the number of variables, we consider a simple empirical Bayes estimator in a linear model setting. We argue that empirical Bayes is particularly useful when the prior contains multiple parameters, which model a priori information on variables termed “co‐data”. In particular, we present two novel examples that allow for co‐data: first, a Bayesian spike‐and‐slab setting that facilitates inclusion of multiple co‐data sources and types and, second, a hybrid empirical Bayes–full Bayes ridge regression approach for estimation of the posterior predictive interval.     

Constrained allocation problems with single-peaked preferences: An axiomatic analysis

We introduce a new class of problems that contains two existing classes: allocation problems with single-peaked preferences and bankruptcy problems. On this class, we analyze the implications of well-known properties such as Pareto optimality, strategy-proofness, resource-monotonicity, no-envy, equal treatment of equals, and two new properties we introduce, hierarchical no-envy and independence of nonbinding constraints. Unlike earlier literature, we consider rules that allow free-disposability. We present characterizations of a rule we introduce on this domain. We relate this rule to well-known rules on the aforementioned subdomains. Based on this relation, we present a characterization of a well-known bankruptcy rule called the constrained equal awards rule. Received: 22 June 2000/Accepted: 21 March 2002 This paper is based on the first chapter of my Ph.D. thesis submitted to the University of Rochester. I wish to thank my advisor, William Thomson, for helpful comments and suggestions.     

The effect of fast and slow decisions on risk taking

We experimentally compare fast and slow decisions in a series of experiments on financial risk taking in three countries involving over 1700 subjects. To manipulate fast and slow decisions, subjects were randomly allocated to responding within 7 seconds (time pressure) or waiting for at least 7 or 20 seconds (time delay) before responding. To control for different effects of time pressure and time delay on measurement noise, we estimate separate parameters for noise and risk preferences within a random utility framework. We find that time pressure increases risk aversion for gains and risk taking for losses compared to time delay, implying that time pressure increases the reflection effect of Prospect Theory. The results for gains are weaker and less robust than the results for losses. We find no significant difference between time pressure and time delay for loss aversion (tested in only one of the experiments). Time delay also leads to less measurement noise than time pressure and unconstrained decisions, and appears to be an effective way of decreasing noise in experiments.     

Comparative Journalism Research – An Overview

This overview focuses on the most common type of comparative journalism research, which is cross‐national comparative research. The overview presents a typology for different types of comparative journalism research, based on whether the research interest is in journalism as an activity or as a product; and, in the case of journalism as an activity, whether the interest is in the system level, the organizational level, or the individual level of journalism. The overview finds that the analysis of journalism on the individual level and of journalism as a product are the most common types of comparative research, whereas comparative analysis of journalism on the organizational level is much under‐studied.     

Religion and the environmental opinion in 22 countries: a comparative study

The objective is to test if religiosity affects environmental opinion in Europe. Using data from European Social Survey (ESS) 2002/2003, the study answers three questions. At the societal level: Is public opinion about the environment different in political systems with different Christian traditions? Is environmental concern less or higher in the public opinion depending on the degree of secularization in the political systems? At the individual level: Is the environmental opinion of the individual affected by the personal confession of faith, religious involvement, and the dominant religious context? At the societal level, the findings show stronger concern for the environment in Catholic and Eastern Orthodox countries than in Protestant countries. The tendency also shows a weakened concern for the environment in countries with a rather secular population. At the individual level, there are significant positive effects on environmental care from Catholic culture, negative effect from Protestant culture, and no effect from religious involvement.     

The Comparison of Grandparents’, Parents’, and Young People's Attitudes Toward Lesbians and Gay Men in Turkey

ABSTRACT

The present study aimed to compare attitudes toward lesbians and gay men across three generations in Turkey. Participants were 112 young people, 169 parents, and 125 grandparents. A total of 406 men and women were involved. The short form of Herek's (1998) the Attitudes Toward Lesbians and Gay Men Scale was used. MANOVAs and ANOVAs were used to analyze the data. Results showed the attitudinal differences toward gay and lesbian people across generations. Grandparents have the most negative attitudes, whereas parents have more negative attitudes than their children. When comparing attitudes of each generation across sex, we found that young women have more liberal attitudes toward gay men compared to all other groups. Discussion focuses on understanding the results within the unique cultural context of Turkey.     

Turkish Capitalist Modernity and the Gezi Revolt

In this paper an attempt is made to reassess how and why the laic/Islamic dual opposition has come to be a decisive factor in the politics of Turkish capitalist modernity. The question as to whether this opposition may survive into the twenty‐first century is briefly discussed. It is noted that in the aftermath of the prolonged confrontation between the emergent imagined community of the Gezi Revolt and the Islamist AKP government, a religiously neutral political identity came into sight in public life, which can be considered as the harbinger of a new kind of social individuality, one which is incommensurate with the laic/Islamic dual opposition.     

Research initiation based on idea-circles: from research object to co-actor

This article details an evaluation of a research project based on participatory research methods organized by the Swedish Disability Federation from 2008 to 2011. In Sweden there has been a lack of productive dialogue with the traditional academic world and the question was raised whether proposals for future research would be different if disabled people formulated them. Nine idea-circles with disabled participants and invited researchers from fields of interest close to the participants produced ideas, developed out of the life experience of being a disabled person. These ideas were developed into 72 research drafts that often reflected key advocacy areas, rather than operationalized research issues. The adjustment from the familiar discourse of political struggle to discussion of research was a complicated process for many. When asked to prioritize among areas for research, the representatives from the disability movement chose areas that are not stressed in mainstream disability research in Sweden.