This article exploits the creation of a paradigmatic multi-ethnic state, Yugoslavia, to examine if, to what extent, and why the effect of ethnic ties on trade costs changes over time. We compile and examine a panel of over 550,000 inter-urban price gaps spanning the area of Yugoslavia in the...

This article exploits the creation of a paradigmatic multi-ethnic state, Yugoslavia, to examine if, to what extent, and why the effect of ethnic ties on trade costs changes over time. We compile and examine a panel of over 550,000 inter-urban price gaps spanning the area of Yugoslavia in the...