Some cross-country studies of the determinants of growth suggest only
a modest role for trade policy. This study, measuring trade openness b
y the rate of growth of the share of exports in GDP, argues that once
the possibility of outliers for trade share growth is considered, a cl
ose relationship between exports and growth emerges that works mainly
through improved efficiency. This relationship proves to be robust to
the inclusion of a set of commonly used right-side variables as well a
s the corresponding import variable.