“…In a many period economy, even if the government acts first in each period, the firms' current investment precedes the government's future subsidy unless the government can commit to a path of subsidies once and for all in the initiai period. A government that cannot ' Even in such models that ignore investment, however, the optimal policy depends criticaily on the specification of the game (Krugman, 1984;Eaton and Grossman, 1986;Carmichaei, 1987;Cheng, 1987Cheng, , 1988Gruenspecht, 1988: Markusen andVenables, 1988;de Meza. 1989;and Neary, 1989).…”