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Stupidest formula I've ever seen - Trump Tariff Explained (And Americans are hopeless in mathematics)
Trump Tariff Formula
τi = Tau, used to represent tariff in this instance, with i being import rate.
xi = Defined as total exports to country from U.S.
mi - = Defined as total imports from country to U.S.
ε = Epsilon, used to represent price elasticity of import demand. The USTR set this at 4.
φ = Phi, used to represent the elasticity of import prices with respect to tariffs. The USTR set this at 0.25.
New tariff rate = (Export - Import) ÷ (4 × 0.25 × Import)
= (Export - Import) ÷ Import
∴ ΔTrump tariff rate = (Export - Import) ÷ Import
Δ = デルタ、数学において変化を表す記号
τi = タウ、ここでは関税を表し、iは輸入税率を示す
xi = アメリカから特定の国への総輸出量
mi = 特定の国からアメリカへの総輸入量
ε = エプシロン、輸入需要の価格弾力性を表す記号で、USTR(米国通商代表部)は4とした
φ = ファイ、関税に対する輸入価格の弾力性を表す記号で、USTRはこれを0.25とした
なので、
新しい関税率 = (輸出 - 輸入) ÷ (4 × 0.25 × 輸入)
= (輸出 ー 輸入) ÷ 輸入
Δトランプ関税率 = (輸出 ー 輸入) ÷ 輸入

