Dhaka, Feb. 1 -- While US President Donald Trump has left no doubt about his love of tariffs, the world is still waiting to see precisely what he will do. He has named China, Canada, and Mexico as his first targets, but it remains to be seen whether he wants a grand slam, or more conditional measures linked to other policy issues (such as acquiring TikTok). For now, the only certainty is that his administration will use tariffs to extract concessions where it can.The issue is complicated, though, because tariffs interact closely with other components of economic policy such as the exchange rate. In theory, higher tariffs should reduce import demand and push up the exchange rate, ultimately making foreign goods cheaper again. This is why T...