Chicken feet, long considered a waste product in the US, have become a profit center for the high-volume low-profit US chicken industry in the China export market. But this export trade is not exempted from political whims.

Lower-pay certified doctors, duly accredited facilities, and 5-star facilities have contributed to the comparative advantage of overseas hospitals in non-emergency big-budget surgeries for international patients.

China's low labor cost, abundant test animals, tax incentives, and permissive research environment have contributed to its comparative advantage in drug development.

Niche comparative advantage in location proximity and fast response time could overcome the disadvantage of high wages in the garment industry.

Sweatshops in low wage countries supplying goods to American companies may offer better paying jobs than other local firms.