Speaking of official versus independantly measured inflation data, the CPI is actually matching up with the Billion Prices Project pretty well. http://bpp.mit.

Speaking of official versus independantly measured inflation data, the CPI is actually matching up with the Billion Prices Project pretty well. http://bpp.mit.edu/usa/ http://bpp.mit.edu/usa/ I'm not sure why you think seasonal adjustment is such a big deal since the pluses and minuses are conserved - it can't have any effect on year over year GDP figures.