![Coles and Woolworths have lower prices than IGA and make more money, so it stands to reason they have lower costs.](http://web.archive.org./web/20171231195629im_/https://www.fairfaxstatic.com.au/content/dam/images/g/h/l/m/a/u/image.related.wideLandscape.460x259.h0bn66.png/1514721678072.jpg)
Australia's least-competitive industries earning 'super-profits'
Economists joke that, whereas they are taught that any barriers to new firms entering a market are bad, allowing profits to be too high, MBA students are taught that "barriers to entry" are good, and shown ways to raise them.