Even though prices very over time I have found the standard remains.
For example, the price of the Whopper and the Big Mac have risen much faster than the price of the Whataburger. That being the case, and using the Whataburger as the standard, it is easy to see that the value (and the desirability, coincidentally) of the Whopper and the Big Mac have fallen. I rarely purchase them now.
The beauty of the Whataburger Standard is that, with a little imagination, it actually transcends the entire spectrum of manufactured goods from clothing to electronics to motor vehicles. The question remains.
"Does this meet or exceed the Whataburger Standard.?"