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Mplus Users Guide v6.. - Muthén & Muthén

Mplus Users Guide v6.. - Muthén & Muthén

Mplus Users Guide v6.. - Muthén & Muthén

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MONTECARLO CommandWith a zero-inflated Poisson model, two variables are considered, acount variable and an inflation variable. The count variable takes onvalues for individuals who are able to assume values of zero and abovefollowing the Poisson model. The inflation variable is a binary latentvariable with one denoting that an individual is unable to assume anyvalue except zero. The inflation variable is referred to by adding to thename of the count variable the number sign (#) followed by the number1.Following is the specification of the COUNT option for a negativebinomial model:COUNT = u1 (nb) u2 (nb) u3 (nb) u4 (nb);or using the list function:COUNT = u1-u4 (nb);Following is the specification of the COUNT option for a zero-inflatednegative binomial model:COUNT = u1- u4 (nbi);With a zero-inflated negative binomial model, two variables areconsidered, a count variable and an inflation variable. The countvariable takes on values for individuals who are able to assume values ofzero and above following the negative binomial model. The inflationvariable is a binary latent variable with one denoting that an individual isunable to assume any value except zero. The inflation variable isreferred to by adding to the name of the count variable the number sign(#) followed by the number 1.Following is the specification of the COUNT option for a zero-truncatednegative binomial model:COUNT = u1-u4 (nbt);Count variables for the zero-truncated negative binomial model musthave values greater than zero.703

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