Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Traders’ arbitrage is crucial for regional market integration. We investigate the patterns of regional arbitrage of rice traders in Antananarivo, Madagascar. On the basis of a trader-level biweekly survey, we find that most traders do not buy rice at the lowest price including observed transportation costs. Random provision of regional price information, intended to reduce search costs, did not improve arbitrage performance. Traders continue trading with districts that they are used to because they worry about quality uncertainty and the trustworthiness of new partners. These findings suggest that nonprice information frictions are important obstacles of regional arbitrage and market integration.