\name{mfblong}
\docType{data}
\alias{mfblong}
\title{Example data for ACEnucfam}
\description{
This is the companion data for ACEnucfam.
}
\usage{data(mfblong)}
\format{
The data is a random subset of the birth weight data from the mental health registry of Norway.

male-a dummy variable for being male; first-a dummy variable for being the first child; midage-a dummy variable for 
mother aged 20-35 at time of birth; highage-a dummy variable for mother older than 35 at time of birth and birthyr-year 
of birth minus 1967 (earliest birth year in birth registry).
}
\source{
The data were obtained from the Biometrics website and preprocessed with f.mfb.R.
}
\references{
Rabe-Hesketh S, Skrondal A, Gjessing HK. Biometrical modeling of twin and family data using standard mixed model
software. Biometrics 2008, 64:280-288
}
\keyword{datasets}
