[求助]曼昆经济学原理的作业很纠结的一道题~完全没法用书本解释吖

duckie

2041

收藏 2008-12-20

Suppose that a market is described by the following supply and demand squations:

Qs= -1+(1/5)P Qd=5-(1/2)P

and suppose that a tax of ￥6 is placed on buyers,search for new equilibrium and explain this kind of economic phenomene.

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pertain

2008-12-21 17:50:00

no tax situation:

solve({q=-1+(1/5)*p, q=5-(1/2)*p},{q,p})

{p = 60/7, q = 5/7}

with tax situation:

solve({q=-1+(1/5)*p, q=5-(1/2)*(p+5)},{q,p});

{q = 0, p = 5}

the market is destroyed by the tax.

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