An analysis of all appellate cases involving slave-sales reveals that
southern courts helped minimize the costs of trading in slaves. Slave-
sales law also surpassed other contemporaneous commercial law in sophi
stication. Why? Greater information gaps between slave buyers and sell
ers called for more complex institutional support. The enormous proper
ty value embodied by slaves also led to more litigation, greater need
for settled law, and a more even match of power between plaintiff and
defendant. Additionally, legal rules surrounding slave sales substitut
ed for the employment law governing free-labor markets.