We study the causes and effects of the competition for order flow by U.S. regional stock exchanges. We trace the origins of competition for order flow to a change in the role of regional exchanges from being venues for listing local securities to being more direct competitors for the order flow...

A surge in orders during the stock market boom of the late 1920s collided against the constraint created by the fixed number of brokers on the New York Stock Exchange. Estimates of the determinants of individual stock bid-ask spreads from panel data reveal that spreads jumped when volume spiked,...