Individual languages exhibit variation in phonological structures both within and across words. This chapter examines the constraints placed on the acquisition of these stochastic phonological patterns. Theoretical perspectives on phonological acquisition are reviewed, revealing the importance of both formal and substantive constraints in a wide variety of learning theories. Empirical studies o...

Multiple imputation (MI) is a practical, principled approach to handling missing data. When used to impute missing values in covariates of regression models, imputation models may be mis-specified if they are not compatible with the substantive model of interest for the outcome. In this article we introduce the smcfcs command, which imputes covariates by substantive model compatible fully condi...