Rein Taagepera|James Hayes
How trade/GNP ratio decreases with country size
University of California, Irvine|University of California, Irvine
ratio countrys foreign trade ie exports plus imports gnp known tendency decrease country size previous studies used single years data trade fluctuates greatly year year paper makes available compilation 19531972 exportgnp importgnp figures 110 countries average importgnp figure found correlate strongly population size simple expression importsgnp 40 p13 applies within factor 2 94 cases correlation development level seen united states data throughout history 17991972 follow inverse cube root pattern constant 20 instead 40 correlation much poorer case exportgnp ration export import figures marginally correlated