Tag Archives: Seasonal Adjustments

According to the movie The Princess Bride, the worst classic blunder anyone can make is to get involved in a land war in Asia. No kidding. The second is something about Sicilians and death. There is also, I’ve come to learn, an unspoken third which cautions against chasing down and then trying to break down seasonal adjustments in economic data. Some things are best left just as they are published. . The Census Bureau today released its estimates for retail sales....

According to the movie The Princess Bride, the worst classic blunder anyone can make is to get involved in a land war in Asia. No kidding. The second is something about Sicilians and death. There is also, I’ve come to learn, an unspoken third which cautions against chasing down and then trying to break down seasonal adjustments in economic data. Some things are best left just as they are published. . The Census Bureau today released its estimates for retail sales....

Retail sales growth in February 2017 was going to be low by virtue of its comparison to February 2016 and the extra day in that month. The Census Bureau’s autoregressive models are supposed to normalize just these kinds of calendar irregularities so that we can make something close to apples to apples comparisons. The seasonally-adjusted estimate for February, however, was calculated to be less than the one for January...