“…Portes and Winter (1980 hereafter P-W) estimated a 'canonical' disequilibrium model (Quandt, 1982) without wishing to defend them with excessive vigour. Note that although plan variables play an important role in our analysis, we do not have independent data on plans in China, like those used by Portes et al (1987) for Poland, so we cannot add a plan adjustment equation like theirs, and we must use a constructed series for plan variables as in the original P-W paper.…”