Prominent on the site first page is "Measuring Worth Is a Complicated Question." I believe it, and one measure of the credibility of the information presented is that the principals are both Professors of Economics at the University of Illinois at Chicago, backed up by a seemingly credible advisory board of academic economists. Did I really write credible and economist in the same sentence!
The content of interest to most of us will be THE CALCULATORS and DATA SETS
|£3.90||using the retail price index|
|£4.03||using the GDP deflator|
|£8.65||using the average earnings|
|£9.96||using the per capita GDP|
|£11.50||using the share of GDP|
Seems like there's plenty of scope, a factor three over half a century, for debate.
Unfortunately there is no Canadian data at the site.