We assess deep integration in the Eurasian Economic Union (EAEU) through the reduction of time in trade costs, the reduction of non-tariff barriers in goods and the liberalization of barriers against foreign suppliers of services. We develop an innovative multi-region model of trade and FDI for preferential trade analysis where we incorporate Dixit-Stiglitz endogenous productivity effects from trade and FDI liberalization. This model produces important differences compared with a perfect competition model. We build on numerous surveys and econometric estimates of the trade and FDI barriers in our focus countries that we helped develop.