Truth® ads,receptivity, and motivation to use or quit tobacco among college students

Abstract

Objective: Examine receptivity and motivation to use/quit tobacco among college students after viewing Truth ads. Participants: Random sample of 10,000 college students invited to complete online survey February 2016 (8.5% response rate). Methods: Quasi-experimental. Participants (N?=?854) watched four ads and answered survey items for each ad. Results: Students rated ad receptivity and decreased motivation to use tobacco higher for the Catmageddon ad than the others. Regardless of ad, men and current cigarette smokers reported lower receptivity. Younger age was associated with lower motivation to use tobacco for all ads. Tobacco users reported greater motivation to quit with the Catmageddon ad. Conclusions: College students were receptive to the Truth ads, and many indicated lower motivation to use tobacco. Men, older college students, and current cigarette smokers were less receptive to the ads, reinforcing the need to develop tailored campaigns to reach these subgroups.     

BayesProject: Fast computation of a projection direction for multivariate changepoint detection

Statistics and Computing - This article focuses on the challenging problem of efficiently detecting changes in mean within multivariate data sequences. Multivariate changepoints can be detected by...     

A Bayesian mixture of experts approach to covariate misclassification

This article considers misclassification of categorical covariates in the context of regression analysis; if unaccounted for, such errors usually result in mis-estimation of model parameters. With the presence of additional covariates, we exploit the fact that explicitly modelling non-differential misclassification with respect to the response leads to a mixture regression representation. Under the framework of mixture of experts, we enable the reclassification probabilities to vary with other covariates, a situation commonly caused by misclassification that is differential on certain covariates and/or by dependence between the misclassified and additional covariates. Using Bayesian inference, the mixture approach combines learning from data with external information on the magnitude of errors when it is available. In addition to proving the theoretical identifiability of the mixture of experts approach, we study the amount of efficiency loss resulting from covariate misclassification and the usefulness of external information in mitigating such loss. The method is applied to adjust for misclassification on self-reported cocaine use in the Longitudinal Studies of HIV-Associated Lung Infections and Complications.     

The effect of supply chain integration, modular production, and cultural distance on new product development: A dynamic capabilities approach

Little research has examined how international firms' operations strategies affect dynamic capability creation or how cultural distance affects operations management. This study addresses these gaps by bridging the work on dynamic capabilities, two operations management techniques (product modularization and supplier integration) and cultural distance. Using a sample of 111 Brazilian automobile suppliers, the study finds that new product development is marginally increased by product modularization but decreased by supplier integration. Cultural distance negatively moderated these relationships. This research extends the dynamic capabilities literature and indicates that operations management strategy is an important part of the dynamic capability formation process.     

Perceived effectiveness and implementation of public relations measurement and evaluation tools among European providers and consumers of PR services

While the need for and lack of implementation of more sophisticated methods for measuring the impact of public relations efforts has been well documented in the U.S. and some other world regions, relatively little information exist about this practice in the European Union. Results from a survey of both consumers and providers of public relations in the EU shows that perceptions of effectiveness and actual use are not related for most advanced techniques of measurement and evaluation. These results demonstrate some potentially important differences between the perceptions of providers and consumers that may support practitioner observations regarding a lack of interest among clients in more accurate assessment of results from public relations activities.     

Standard Errors for Elasticities: A Comparison of Bootstrap and Asymptotic Standard Errors

This article compares two methods of deriving standard errors for elasticities in a linear expenditure demand system with first-order autoregressive errors. The first is the ordinary Taylor series method and the second is Efron's bootstrap. In an example problem, these two methods yielded similar values for the standard errors, with the exception of the income elasticity standard errors, for which the asymptotic standard errors were apparently too large by a factor of two.     

Existence of Maximum Likelihood Estimates for Multi-dimensional Exponential Families

This paper deals with the existence of maximum likelihood estimators for multi-dimensional exponential families, including curved exponential families. It first gives an algorithm for determining the MLE from the data. Then it establishes that when the parameter set is either open or relatively closed in the natural parameter set, the MLE of the parameter exists in the sense of Hoffmann-Jorgensen.     

The Politics of Physical Differences: Disability and Discrimination

Although a "minority-group" model has emerged to challenge the traditional dominance of the "functional-limitations" paradigm for the study of disability, research on attitudes toward disabled people has not produced a theoretical orientation that reflects these developments. This paper proposes a new conceptual framework, based on the fundamental values of personal appearance and individual autonomy, for assessing the "aesthetic" and "existential" anxiety aroused by persons with disabilities. Investigations using this perspective might contribute to determining the attitudinal foundations of the competing models that are dividing research on disability.