In economics there is a long-standing debate on whether emerging markets should adopt a fixed exchange rate currency regime or leave their exchange rates up to markets to decide. Intuitively, exchange rate is just another price, similar to the price on a sack of potatoes, a liter of milk or a kilogram of honey. Except that exchange rate is the price of 1 unit of foreign currency (say, 1 US dollar) in terms of our domestic currency. Textbook economics would tell us that price flexibility is essential for markets to function well, to quickly clear up any s...