How unspoken collusion fixed petrol prices

8 February 2017

A study of 15 years of unleaded petrol prices in Perth has revealed unspoken collusion by fuel companies, to coordinate prices, soften competition, and enhance retail margins.

Researchers investigated data across 771 petrol stations in Perth's metropolitan area, using data from Western Australia's price transparency program, Fuelwatch, between January 2001 and December 2015.

Overall, the researchers investigated more than 1.7 million different retail petrol prices, covering a period of a decade and a half.

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