>but not in these 3 in particular I think barriers to entry. In other markets profits like in these 3 industries would lead to an influx of new entrants which

>but not in these 3 in particular I think barriers to entry. In other markets profits like in these 3 industries would lead to an influx of new entrants which would put compete away excess profits. But try opening a new hospital or school - years of work and regulations to fight, and new schools have a long uphill climb to achieve reputability. Housing is constructed by bullshit restrictive zoning.