why US #1GNI? - cuz of farming(US can produces enough food to feed the world) why US #1GDP? - cuz of its efficiency (i.e. to produce 1ton of corn - Mexico: 18days&20人/ US:2hrs&1人) comparative advantage - focus on what you good at(= can e…

we had lunch at Lotus Square - Vietnamese food at Eastgate. it started snowing from 4pm to 8pm? evening classes are canceled :) but it took 3hours to come back home! that was a horroble, awful night... sometimes tires turns by itself and n…