Why We Use “Seasonally Adjusted” Data

This graph from Calculated Risk is a great example of why we use "seasonally adjusted data": The red line is the raw, unadjusted monthly data.  It's noisy. It goes up and down dramatically.  But it has a pattern to the rises.  Every October, November, and December it rises dramatically and then falls in January.  That's … Continue reading Why We Use “Seasonally Adjusted” Data