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α: calibrated so average coauthorship-adjusted count equals average raw count
This study examines the effects of the reduced transaction costs on the price behaviours in the second half of the nineteenth century, where declines in transaction costs were mainly caused by railroad development during this period. It employs a panel test introduced by Levin and Lin (1992) on the convergence of wheat and corn prices using a panel of 48 US states from 1866 to 1906. The results show that, by decreasing transportation costs, railroads played an important role in price convergence among states of the USA for wheat and corn during the postbellum period.