“…On the one hand, in an influential work, Baier and Bergstrand (2001, p. 19) found evidence showing that “income growth, tariff rate reductions, and transport‐cost declines all contributed nontrivially to the real growth of world trade.” 1 Moreover, they also found that the contribution of tariff reductions is just three times as large as transport cost reductions. On the other hand, Greaney (2001, p. 268) empirically made clear that Japan's import subsidies “benefit both foreign and home producers at the expense of domestic consumers and taxpayers,” which contrasts to the conventional wisdom that foreign firms and domestic consumers gain from import subsidies at the expense of domestic firms and taxpayers. Moreover, there is a growing literature on firm heterogeneity that highlights the role of import subsidies for welfare, e.g.…”