個體經濟學題目 - 經濟

問題: Cigarettes are supplied by a competitive industry which is in long run
equilibrium. Cigarettes sell for $2 a pack. One cigarette company is
named Camel. One day, the price of raw tobacco falls(cigarettes are
made from raw tobacco) but at the same time, the government begins
requiring each cigarette company to pay $10000 a year for a license
to sell cigarettes.

a. In the short run, what happens to the price of cigarettes,
the total number of cigarettes smoked, the number of Camel cigarettes
smoked, and the number of firms in the industry?

b. Suppose that in the long run, as a result of the combined
changes, the price of cigarettes happens to return exactly to $2 a pack.
In the long run, what has happended to the total number of cigarettes
smoked, the number of Camel cigarettes smoked, and the number of firms
in the industry?

我的想法:
這題我一直卡在政府課稅的$10000跟原料下跌到底誰輕誰重?
(也就是不確定short-run supply究竟是往上或往下移動呢)
題目說的"short run" 也是要考慮license fee嗎?

有點無從下手 請板友指教了 <(_ _)>

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