Financial experts' discoveries about the advantages of exchange have frequently been dismissed by government strategy producers, who have often looked to safeguard homegrown businesses against unfamiliar rivalry by raising obstructions, like duties and import shares, against imports. Normal duty levels of around 15% in the late nineteenth century rose to around 30% during the 1930s, following the entry in the United States of the Smoot-Hawley Tariff Act. [30] Mainly as the consequence of peaceful accords under the protection of the General Agreement on Tariffs and Trade (GATT) and in