Find trade between countries using the gravity equation model. The distances from Paris,( France), to: Frankfurt, (Germany); Stockholm, (Sweden); are about 400 miles, 450 miles, respectively. If GDPs are for: Germany 3900 billions France 2800 billions Sweden 606 billions Find trade between France and Germany and between France and Sweden. Assume B = 10.5 and exponent of distance is 1.25 in the gravity equation model. What would be the predicted trade for both cases.?.