Advertising firms already film how people react to ads, usually in an artificial setting.
广告公司已经录制了人们如何对广告作出反应，这通常是在人工刻意创造的环境下进行。
For example. firms can agree in advance to raise prices together or to limit competitive advertising.
为例子企业可能事先同意一起提高价格或限制竞争做广告。
For example. firms can agree in advance to raise prices together or to limit competitive advertising.
为例子企业可能事先同意一起提高价格或限制竞争做广告。
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