There's some work being done by an economist (Jose Azar) into common ownership and its impact on prices.
Posted by
Roger More (aka rogermore)
Feb 1 '16, 06:28
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Basically, his thought is that in certain industries, the five biggest fund managers in the US have a slice of everything, and that these overlapping shareholders leads to less vigorous competition in these markets.
He has looked at the airline industry and the retail banking industry so far - his study of the airline industry says that prices are higher by 11% than they should be because of this.
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