The focus group here at "A Dash" rejected the original title for this piece, the more professorial "Understanding and Predicting Revisions in Government Data." Whatever the title, it is the same topic.  It will be uninteresting to the many who have already made up their minds.  It continues our theme about those who disparage information from many sources. There is a quiet battle going on.  It is more important than most realize.  On one side are those whose every article seeks to "dumb down" the discussion.  They find something wrong with every data release.  These commentators, who almost universally lack the traditional training or credentials, use some "common man" argument, appealing to what most readers already believe.  What do they have at stake?  If correct, then their opinions are just as good as the PhD economists!  And with no cost in time ...