Where is the petrol price data?

Over the fold is a piece I had published in Crikey today. I can now confirm that Informed Sources is unable to provide the same data the ACCC had access to, to third parties such as academics.

Where is the petrol price data?

Joshua Gans, Crikey, 17th April, 2008

The Federal government announced yesterday that it would adopt Western Australia’s FuelWatch scheme nationwide. That scheme requires petrol station owners to fix their price for the day and upload that price to a centralised database. Consumers and aggregators can then draw on that information to dramatically enhance motorist’s ability to target the cheapest petrol stations.

In its petrol inquiry, the ACCC conducted an econometric analysis of WA’s scheme and demonstrated that the average petrol price in WA dropped significantly when the scheme was introduced there: of the order of 1.5 cents per litre. And this was a long term drop that didn’t seem to favour independents or majors. Put simply, it seemed that providing information stimulated competition. What is more it removed the weekly price cycle. Discounts were still there but once every couple of weeks.

As an economist, I believe that providing information to consumers is a good idea. Moreover, as a person concerned about how policy gets introduced, rolling out a scheme nationwide based on seeing what happened in one state first is very prudent. But when I discussed this approval on my blog, commentators asked: Where is the independent analysis?

Of course, the ACCC was the independent analyst here but I did wonder, can we academic economists get the data for ourselves and replicate the ACCC findings? I contacted the ACCC and was told that they could not give it to me. It was obtained under their legislative powers, not from petrol companies, but from private sources — in particular, Informed Sources. This is a company that has done a deal with petrol retailers to get them to supply price information that they then provide (and I presume charge) petrol retailers and others to access. So if I wanted the data I would have to go to them. From their site it seems that the data is not freely available. But they have been providing some reports and analysis to select academics who are now claiming to contradict the ACCC findings.

So I called up Informed Sources to see if I could get the data the ACCC actually used. However, as it was site specific, I was told that they were not permitted to provide it (although they would get back to me with a definitive answer). This is their business, so fair enough.

I think that if anyone wants to challenge the ACCC findings they need to push to make the exact data they gave to the ACCC freely available.

After all, that is precisely what the government is intending to do for future prices.

8 thoughts on “Where is the petrol price data?”

  1. The one clear thing from the Fuelwatch website (which publishes monthly historical data) is that there is no discernable weekly cycle.


    So the era of cheap Tue/Wed petrol will be over, which per Brendan Nelson’s comments may well mean that those who fill up weekly will pay a higher average price.

    It would be interesting to see station statistics for %ge of fuel sold on each day of the week and how that compares to the cycle.


  2. I just found out about the WA Government’s FuelWatch website.

    They also provide a feed (RSS) for mashups. Nice.

    Here’s a Google Map that maps the prices:


    You can play with the data via Yahoo Pipes:


    Can’t wait for the Federal version – I think this is better than the commercial Motormouth website:


    (I know this isn’t really economics, but maybe it demonstrates the value of governments stepping in and making market data available for free instead of relying on individuals to do it.)



  3. There’s no clear weekly cycle – there’s a pretty clear 2 weekly cycle though. Cycles will persist, they’ll just be slower to reflect the impaired ability for service stations to adjust prices and compete.


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