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Bu tezde, Eaton ve Kortum (2002)'nin Ricardocu ticaret modelini tahminederken ulkelerin verimlilik daglmn gostermede Frechet daglmn almakyerine diger uc deger daglm olan Weibull daglmn kullandk. Eaton ve Ko-rtum (2002) modelinde de oldugu gibi, analitik kolaylk nedeniyle, verimlilikdaglmnn Frechet daglmn izledigini varsaymak artk uluslararas ticaretliteraturunde yaygn bir gelenek olmustur. Ancak, son calsmalar tahminsonuclarnn bu parametrelemeye duyarl oldugunu gostermistir. Bu goruskarssnda, Eaton ve Kortum (2002) modeli verimlilik daglm icin Weibulluc deger daglmn kullanarak tahmin yaptk ve farkl daglm kullanldgndatahmin edilen degerlerin degistigini gosterdik.Anahtar Kelimeler: Ticaret, teknoloji, cografya, refah arts, uc deger daglmlar,verimlilik. In this thesis, we estimate the Ricardian trade model of Eaton and Kortum(2002) using a dierent extreme value distribution for the productivity distri-butions of countries. Due to its analytical convenience, it is now a commontradition in international trade literature to assume that the distribution ofproductivities follows a Frechet distribution, which is the case for Eaton andKortum (2002) model as well. However, recent studies have shown that theestimation results are sensitive to this parametrization. In view of this, weestimate the Eaton and Kortum (2002) model where Weibull distribution isused for the distribution of productivities and show that estimated resultschange when we use another distribution.Keywords: Trade, technology, geography, welfare gains, extreme value distri-butions, productivity 102