Update on Sydney Petrol Prices

A little while ago I wrote about the relationship between crude oil prices and the price Sydney motorists are paying for petrol at the pump. The Australian Automobile Association (AAA) has now released their price data for June and, not surprisingly, prices continued to track moves implied by rising crude oil prices. The simple regression model suggested that average prices would be up 8 cents/litre. The AAA data shows a rise of 10 cents/litre in the average Sydney price.

The Price of Carbon for Petrol

Commenting on my petrol prices post, Mark Lauer suggested that excise on petrol should in fact be increased to deal with negative externalities:

Personally I think we should be increasing the excise. It represents the many negative externalities that car use in our society creates: carbon emissions, use of space for (larger) roads; materials, construction and maintenance of (larger) roads; particulate pollution; deaths and injuries from road accidents, and so on, all of which scale with mileage and hence fuel use. And our understanding of all these factors is moving in the direction of increased disutility. Hence the charges should be increased.

I’ve been thinking about petrol and carbon emissions a bit over the last few weeks, so this is as good a prompt as any to put down my thoughts here on the Mule. I should also point out that I have Mark to thank for the back of the envelope calculation that I’ll discuss here.

Sydney Petrol Prices

Soaring petrol prices have led to all sorts of calls for action to help reduce prices. The Opposition called for a 5 cents per litre reduction in the excise on petrol, which currently stands at 38.1 cents per litre. (See note below for an explanation of the strike-throughs). the abolition of the double taxation of petrol by eliminating Goods and Services Tax (GST) on petrol excise. Since the excise is currently 38.1 cents per litre, this would save 3.8 cents per litre. One Victorian Liberal MP, Chris Pearce, went further and called for a 10 cent reduction in petrol excise. The Rudd Government initially claimed that there was nothing more that they could do, but then buckled to the pressure and has proposed the introduction of a national FuelWatch scheme aimed at promoting price transparency at the bowser. The Minister for Competition Policy & Consumer Affairs, Chris Bowen, has indicated that this scheme is expected to save around 2 cents per litre. So, what is going on with petrol prices and what are the merits of these proposals?