how does wayne do it?, page-137

the Australian institutions would rather short these companies for a quick profit than invest in long term developement.So they dont do due diligence because you dont have to to short and make a quick buck by pushing down the value of a company.
Or do they do due diligence to see if there is less value in a share than the market says?
You know the market well.Do they have to provide due diligence when shorting or only when investing?