22 
INTERNATIONAL TRADE 
their wages for the same amount of labor; this being the concrete 
form in which the greater material prosperity of the United States 
shows itself. There is no gain to anyone from moving goods 
between the two countries. Labor might possibly move to advan- 
tage but goods cannot move. And so each country goes its own 
way, each with its own scale of money incomes, both with the same 
scale of prices.