Macroeconomics is not a simple subject and I claim no special knowledge of it. However one of Paul Krugman’s recent blog postings caught my eye if for no other reason than the sheer wonkiness of the title, “Vector Autoregressions And Keynesian Macro.”  In this posting, Krugman references materials in Christina and DavidRoamedr’s Macroeconomic History course. Chapter … More Vector Autoregressions, Simplicity and Congress