Everybody who works for the rating agencies is Keynesian trained. All they teach at the most selective universities is Keynesian economics. So, yes it influence their decisions, because they all accept the demand paradigm and veiw economic performance through a demand paradigm with reference to demand metrics that were created by Keynesians. They all believe that money supply and deficit spending can be used to modulate business cycles and they do not consider innovation or entrepreneurship as imporant economic factors. They do not consider fiscal policy, taxation, as a dynamic process with behavioral feedbacks and that obviously impacts their revenue assuptions. So, yes the economic view makes a difference...you won't be able to see the difference unless you go to an economy that is not run by Keynesians....take a look at China and the influence of Bob Mundell on thier economic policies. Look at the difference between the amount of 'investment' in the Chineese GDP compared to the amount of investment in the U.S. GDP. Consider the last time you heard a rating agency call for more 'investment' as a GDP component.
