This paper provides an ex-post analysis of the impact of trade liberalization in Vietnam between 1993 and 1998, taking into account regional differences. First, a price pass-through analysis is performed to measure how trade liberalization influence provincial prices. These results are plugged into a farm household model in order to capture the effects on households' outcomes such as quantities produced, agricultural income and profits. An original continuous treatment assessment measures the effects of trade liberalization proportionally to the degree of initial household specialization in export crops. My findings suggest that trade liberalization has differently affected domestic prices and agricultural variables across profits groups and regions. Trade liberalization in agriculture, between 1993 and 1998 has increased inequalities in Vietnam, with a negative evolution of agricultural profits for the poorest.