This discrete choice design is generated using the
function. There are 8 choice sets, each containig 3 alternatives (rows), of
which one is a no choice option. The no choice option consist of an
alternative specific constant and zero's for all other attribute levels. There
are three attributes (time, price, comfort) with 3 levels each, all of which
are dummy coded (columns).
A matrix with 24 rows and 7 variables
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