Here is the reality. We have intense uncertainty on US fiscal, energy and health policies. Nobody knows what their effective tax rate is going to be next year so they cannot plan. When you model that uncertainty in economic terms, you end up with higher liquidity ratios in business and rising savings rates in the personal sector. This damps spending growth and spending is what gross domestic product is all about.
美國目前的現實情況是：在財政、能源以及醫療政策領域存在巨大不確定性。沒有人知道自己明年的實際稅率將是多少，因而也無法提前進行財務規劃。如果將不確定性上升的影響放在經濟模型框架下考察，你會得出企業流動資產比率以及居民儲蓄率都將上升的結論。這將抑制支出增長，而支出規模直接關系到GDP。
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