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Erosion of trade preferences currently being enjoyed by the least developed countries (LDCs) and some developing countries remains an important area in the ongoing trade negotiations. The different positions regarding the preference erosion question besides being informed by political economy considerations are also founded on empirical results of this particular question. But does the methodology used for the empirical analysis matter? In this article, the importance of preference erosion due to MFN liberalization on agriculture is analyzed. Drawing from the potential complementary strengths in triangulation, the article uses both partial and general equilibrium analyses. The article shows that the ranking of preference erosion as an issue of policy concern is influenced by the empirical methodology adopted. However, irrespective of the rank, the article concludes that preference erosion is an important issue not only in terms of welfare, but also as it has impacts on incomes for preference-receiving countries. [ABSTRACT FROM AUTHOR]