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题库 / OG2018V-CR-162
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 raiding average prices for coffee, it encourages more coffee to be produced than consumers want to buy. This lower prices for no-fair-trade coffee and thus lowers profits for non-fair-trade coffee farmers.
To evaluate the strength of the economist’s argument, it would be most helpful to know which of the following?
Whether there is a way of alleviating the impact of the increased average prices for coffee on non-fair-trade coffee farmer’s profits
What proportion of coffee farmers in developing nations produce fair-trade coffee
Whether many coffee farmers in developing nations also derive income from other kinds of farming
Whether consumers should pay extra for fair-trade coffee if doing so lowers profits for non-fair-trade coffee farmers
How fair-trade coffee farmers in developing nations could be helped without lowering profits for non-fair-trade coffee farmers
推理： FT coffee价格跟高〉FT会提高咖啡均价，吸引更多人种植咖啡》NFT供过于求，价格下降〉这个举措可能对NFT咖啡农不利
要评估这个推理是否够强，需要考虑1 是否NFT的咖啡农会多种植咖啡，2 咖啡的价格是否会大波动 3 是否有可能会滞销 4均价相关的因素
B选项关注的就是FT咖啡农的比例，如果FT咖啡农占比很低的话，他们对均价的影响就不会很大，从而也就不会对市场有很大的影响，后边的推理也就无从说起
做这种题最需要的就是理清逻辑链条，对逻辑链条任一环进行削弱或者加强都对最后的结果有影响。
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