"Commerce of markets and fairs" is the study of temporary markets held at regularly interval in the same place.
Some questions in "Commerce of markets and fairs" involve trade during the Roman empire, solving the early problems of distribution, encouraging trade within conquered provinces, law of markets and fairs.
Why study "Commerce of markets and fairs"? understand the economical development of Western countries, distinguish companies from others through fairs, improve the economy of an area.
Xavier Colin, Edward F. Cousins Claudio Marsilio, N. Taranto are a few specialists of "Commerce of markets and fairs".