Marketing and Social Structure in Rural China Part II

In A.D. 1227, during the Southern Sung, the four hsien on the peninsula in Chekiang which is dominated by Ningpo supported twenty-six rural markets; six and a half centuries later, during the Kuang-hsü reign, there were approximately 170 rural markets in the same territory. Chin-t'ang hsien , Szechwan, had four rural markets at the beginning of the K'ang-hsi reign in 1662; by 1875 the number had increased to thirteen and by 1921 to thirty-two. Rural markets in Yen-shan hsien , Hopei, rose from twenty-three in 1868 to thirty-seven in 1916. By what principles and in accordance with what patterns do markets thus proliferate on the landscape?