Mplus Users Guide v6.. - Muthén & Muthén

MONTECARLO Command(ordinal), unordered categorical (nominal), count variables, and time-toeventvariables.Censored variables can be generated with censoring from above or frombelow and can be generated with or without inflation. The letters cafollowed by a censoring limit in parentheses following a variable nameindicate that the variable is censored from above. The letters cbfollowed by a censoring limit in parentheses following a variable nameindicate that the variable is censored from below. The letters caifollowed by a censoring limit in parentheses following a variable nameindicate that the variable is censored from above with inflation. Theletters cbi followed by a censoring limit in parentheses following avariable name indicate that the variable is censored from below withinflation.For binary and ordered categorical (ordinal) variables using maximumlikelihood estimation, the number of thresholds followed by the letter lfor a logistic model or the letter p for a probit model is put inparentheses following the variable name. If no letter is specified, alogistic model is used. For binary and ordered categorical (ordinal)variables using weighted least squares estimation, only the probit modelis allowed. If p is not specified, the probit model is used. The numberof thresholds is equal to the number of categories minus one.For unordered categorical (nominal) variables, the letter n followed bythe number of intercepts is put in parentheses following the variablename. The number of intercepts is equal to the number of categoriesminus one because the intercepts are fixed to zero in the last categorywhich is the reference category.Count variables can be generated for the following six models: Poisson,zero-inflated Poisson, negative binomial, zero-inflated negativebinomial, zero-truncated negative binomial, and negative binomialhurdle (Long, 1997; Hilbe, 2007). The letter c or p in parenthesesfollowing the variable name indicates that the variable is generated usinga Poisson model. The letters ci or pi in parentheses following thevariable name indicate that the variable is generated using a zero-inflatedPoisson model. The letters nb in parentheses following the variablename indicate that the variable is generated using a negative binomialmodel. The letters nbi in parentheses following the variable nameindicate that the variable is generated using a zero-inflated negative693