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<p>Suppose the demand function and supply function of cigarette of US are given as:</p><p>Q(D)=28-2P</p><p>Q(S)=4+4P</p><p>If the price is $4 per package, the quantity demands are 20 packages.</p><p>What if the government imposes a $2 tax on buyers for each package of cigarette purchased. What os the real burden on the buyers? What is the burden on the cigarette makers?</p>

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关键词：sos GOVERNMENT function Packages purchase government function quantity package demand

不征税时，p=4,Q=20

征税后，消费者付出价格Pd和生产者得到的价格Ps不同

有Pd=Ps+2，

又Q(D)=28-2Pd

Q(S)=4+4Ps

推出Ps=10/3   Pd=16/3 Qs=Qd=52/3

the real burden on the buyers is (52/3+20)*(16/3-4)*0.5=224/9,占了2/3

 the burden on the cigarette makers is (52/3+20)*(4-10/3)*0.5=112/9,占了1/3