This paper develops a simple model to analyze the dual-track approach to ma
rket liberalization as a mechanism for implementing efficient Pareto-improv
ing economic reform, that is, reform achieving efficiency without creating
losers. The approach, based on the continued enforcement of the existing pl
an while simultaneously liberalizing the market, can be understood as a met
hod for making implicit lump-sum transfers to compensate potential losers o
f the reform. The model highlights the critical roles of enforcement of the
plan for achieving Pareto improvement and full liberalization of the marke
t track for achieving efficiency. We examine how the dual-track approach ha
s worked in product and labor market liberalization in China.