Although widely available, little is known about the effectiveness of youth cessation treatments delivered in real-world settings. The authors recruited a nonprobability sample of 41 community-based group-format programs that treated at least 15 youth per year and included evidence-based...

The purpose of this research was to understand institutional review board (IRB) challenges regarding youth-focused research submissions and to present advice from administrators. Semistructured self-report questionnaires were sent via e-mail to administrators identified using published lists of...

In this paper, we consider the multivariate ARMA–GARCH process governed by Markov switching coefficients. We show under proper assumptions that the process holds the L2-NED property and obeys the multivariate functional central limit theorem. The multivariate Markov switching constant...

While much is known about the economic determinants of tobacco use, very little is known about the economic determinants of nicotine replacement therapy (NRT) use. This paper is the first econometric study to examine the impact of advertising on NRT demand. Pooled cross-sectional time-series...

Several statistical packages are capable of estimating generalized linear mixed models and these packages provide one or more of three estimation methods: penalized quasi-likelihood, Laplace, and Gauss--Hermite. Many studies have investigated these methods' performance for the mixed-effects...