However, there is empirical evidence which shows that airline ticket prices typically increase over time while theatre tickets are often sold at a discount on the day.

然而，事实证据表明，机票价格往往是随着时间增加，而戏票总是在上演当日打折出售。

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Airlines' offering discount for tickets one after another results in change of ticket price arrangement in airline market.

航空公司竞相给机票打折引致了民航客运价格安排的变迁。

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