First published: 25 September 2016This paper investigates the links between product quality and the pro-trade effect of ethnic networks using a large panel on bilateral stocks of immigrants with information for 19 OECD destination countries and 177 origin countries. In line with the approach of Rauch and Trindade, we classify traded goods according to their quality level and separately estimate pro-trade elasticity of ethnic networks for each subgroup. We allow for heterogeneity of immigrants according to both the level of per capita income of their country of origin and their education level. Our findings suggest that the trend of the pro-trade effect of immigrants over quality seems to be driven by the North-South specialisation across va...