Some individuals place more value on, and are willing to pay more for, style y rather than style x, whereas others prefer x. Producing both x and y enhances overall consumer well-being. Fifty years ago, only x was feasible.
As a result of the appreciation in the rand exchange rate in 2009 and  BIS Review 78/2010  3  earlier this year, there were heightened calls for the Bank to intervene aggressively in the foreign exchange market or to even peg the rand to the US dollar.