1A general implementation of Structural Equation Models with latent 2variables (MLE, 2SLS, and composite likelihood estimators) with 3both continuous, censored, and ordinal outcomes (Holst and 4Budtz-Joergensen (2013) <doi:10.1007/s00180-012-0344-y>). The package 5also provides methods for graph exploration (d-separation, back-door 6criterion), simulation of general non-linear latent variable models, 7and estimation of influence functions for a broad range of statistical 8models. 9