The economics blog rolls this week are teeming with debate over Charles Murray’s new book Coming Apart: The State of White America, 1960-2010. To name only a few, Paul Krugman, Tyler Cowen, David Frum, and Bryan Caplan have all been a part of the discussion. The crux of the debate (and frankly it’s a little hard to follow who is arguing for what and on which side) lies in the question of causality in relationship between socioeconomic class, education, psychological predispositions and factors, and earnings. Krugman has a nice graph that depicts the stipulated fact by all sides:

From my perspective, no one (except Cowen to some extent) has been willing to say that there are a combination of factors with various levels of circular causality contributing to a general decline in the traditional structure and values of family units particularly in lower socioeconomic strata. Some of the causes are earnings, some are predispositions, some are genetic, some are part of the poverty cycle, and the list goes on beyond these I’m sure. Perhaps someone else has already articulated this feeling better than I have here, but I haven’t seen it yet.
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