Longitudinal dataset derived from the National Youth Survey about marijuana consumption measured by ordinal variables with 3 categories with increasing levels of consumption (1 "never in the past year", 2 "no more than once in a month in the past year", 3 "more than once a month in the past year").
Usage
data(data_drug)
Arguments
Format
A data frame with 51 observations on the following 6 variables.
V1
reported drug use at the 1st occasion
V2
reported drug use at the 2nd occasion
V3
reported drug use at the 3rd occasion
V4
reported drug use at the 4th occasion
V5
reported drug use at the 5th occasion
V6
frequency of the response configuration
References
Bartolucci, F. (2006) Likelihood inference for a class of latent Markov models under
linear hypotheses on the transition probabilities. Journal of the Royal Statistical Society,
series B, 68, 155-178.