It is often argued that institutional factors constrain the labour sup
ply choices open to the individual. In this paper we present an altern
ative to the standard neoclassical model of labour supply under the pr
esumption that the number of hours choices are discrete and finite, We
explore alternative specifications of discrete models of labour suppl
y which are appropriate for the microsimulation of the behavioural imp
act of tax policy reform. Policy simulations are carried out for a bas
ic income reform. (C) 1997 Elsevier Science B.V.