Economist: Paying extra for fair-trade coffee-coffee labeled with the Fairtrade logo-is intended to help poor farmers, because they receive a higher price for the fair-trade coffee they grow  But this practice may hurt more farmers in developing nations than it helps  By raising average prices for coffee, it encourages more coffee to be produced than consumers want to buy
This lowers prices for non-fair-trade coffee and thus lowers profits for non-fair-trade coffee farmers
What proportion of coffee farmers in developing nations produce fair-trade coffee