關(guān)于A-level考試,，在這邊小編真誠地建議同學(xué)們,，大家就把contestable market當(dāng)作一個(gè)new market，在你還不是很熟悉他的時(shí)候,，不要把他與其他market structure聯(lián)系起來,，等你對(duì)他認(rèn)識(shí)充分的時(shí)候，你盡可以大膽地將之與其他market 進(jìn)行比較,，不過切記,，距離產(chǎn)生美。
　　關(guān)于contestable market的幾大特點(diǎn)要牢牢把握：
　　定義如下:
　　Contestable market: any market structure where there is a threat that potential are free and able to enter this market.
　　特點(diǎn)如下：
　　The number of firms in the industry may vary from one (a monopolist) having complete control of the market, to many, with no single firm having a significant share of the market.
　　In a contestable market, there is freedom of entry to and exit from the market. This means there will be no sunk costs.
　　Firms are short-run profit maximisers, producing where MC = MR.
　　There is perfect knowledge in the industry.
　　The potential forhit-and-runcompetition exists.
　　重中之重點(diǎn)小編已經(jīng)畫出來了，大家務(wù)必注意,，在寫作的時(shí)候你會(huì)發(fā)現(xiàn)永遠(yuǎn)離不開對(duì)low barriers,，sunk cost的討論，從而努力證明某某市場具有contestability,。
　　所以,，這里也要求同學(xué)們獨(dú)具慧眼地在材料中尋找可能跟contestability相關(guān)的蛛絲馬跡。