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其實根本冇討論空間

why bother to sell in black market at first then

又返返去呢個問題：黑市入面有冇shortage

咁咪已經係另一個market

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Sellers can sell at a higher price?

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if there is no restriction on first market,
seller can sell at the same price as black market
which implies first market is in shortage

So we need to define black market
it must be second hand market or not?

克服都寫錯，有資格同師兄相提並論？

首先一手市場完 有shortage 有非價價競爭無異議架la？

2手市場(黑市)賣嘅話你當佢係完全另一樣野黎，本身定價對件貨嘅value 無影響，因為本身個賣價set左ceiling。

咁黑市入邊點競爭冇人知，如果用價格，佢自然會慢慢調整到 eq, 未到eq前都會有shortage 自然會有非價格競爭，明？

Assume it is perfect competition

點解黑市會被定義第二個市場既？唔同既銷售渠道係咁睇？

利申 真心請教 理科撚

So u define black market as second hand market
but i am not

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