The 1991-92 negotiations for a North American Free Trade Agreement (NA
FTA) are modelled at two points in time during the negotiation process
from a Mexican perspective. The first model in February 1992 captures
the positions of the parties on several key issues. The second model
in April 1992 concentrates on the energy issue, which is of particular
importance to Mexico. The formal model provided a framework for struc
turing the negotiation, and a communications medium for discussing and
recording it. The analyses were fairly accurate as predictors of even
ts and could have been effective in giving advice to the negotiations.