Dataset: aircity_traffic.dat

Source: D.M. Belmont (1958). "A Study of Airline Interstation Traffic,"
Journal of Air Law and Commerce, Vol. 25, #3, pp361-368.

Description: Interstaion Traffic, Total Traffic and Distance between
n=41 pairs of cities for Sept. 17-30,1955.

Potential Model: T_ij = k*(T_i*T_j)^p/(D_ij^q)

Variables/Columns
City1   1-8
City2   9-16
Inter-City Distance (D_ij, miles)  18-24
City 1 Total Traffic  (T_i)   26-32
City 2 Total Traffic  (T_j)   34-40
Inter-city trafic   (T_ij)    42-48