An applied general equilibrium model with oligopoly and scale economies, based on detailed plant-level data, is used to contrast the impacts of the Morocco-EU free trade area (FTA) to multilateral trade liberalization on Morocco's economy. Simulation results show that the FTA agreement is likely to have adverse effects on Morocco due to : (a) deteriorating terms of trade, (b) reductions in output per firm in industries dominated by scale economies, (c) diversion of imports away from non-EU suppliers, and (d) potentially adverse effects on the aggregate demand for labor. We contrast this FTA with a multilateral liberalization scenario along the lines of those proposed under the Doha Development Round and find this more beneficial to Morocco, with overall welfare gains due to : (a) lesser terms of trade losses, (b) positive scale effects, (c) non-preferential liberalization of imports into Morocco, and (d) a positive impact on aggregate labor demand. We conclude that Morocco would be better off pursuing trade liberalization in the multilateral arena.