A standard result in export subsidy/tax game models is that if governm
ents can credibly precommit themselves to a particular trade policy, a
n export subsidy (tax) is optimal when firms engage in quantity (price
, respectively) competition (Brander and Spencer, 1985; Eaten and Gros
sman, 1986). In this paper, we consider a model of dynamic duopoly whe
n demand in the importing country is uncertain. We show that in a symm
etric equilibrium a subsidy is generally optimal for price competition
. (C) 1997 Elsevier Science S.A.