Great Graphic: How Much Gas an Hour of Work Buys

This Great Graphic is from Thomson Reuters.  It shows how much gasoline can be bought with an hour of work at the average hourly wage in the US. 

In many ways, I think this is a critical, yet overlooked, measure of cost.  How long does one have to work to earn the money to purchase something?  I explored some of this in my book, Making Sense of the Dollar.  

As the seemingly endless debate among economists illustrate, money measured over time and space is terribly difficult and fraught with all sorts of methodological issues.  An hour's work at the average wage seems so much more revealing about the true cost of living.