mr. henson that would address the constitutionally. your thoughts as to what level you would suggest long-term, given the historic average being 20% for the last 60 years? >> well, there are tradeoffs there that really it's up to the elected representatives to make. the only thing i would say is that we need to enforce some sense of consistent perspectives. so those folks who believe that low tax burdens are very important need to also specify how they're going to cut spending. and those who see much benefit in spending need to sort of specify what their revenue source is going to be. so we can force people to recognize there are two sides to this. that's the way to ultimately bring down the deficits. >> what would you suggest, based upon your obvious extensive knowledge of the area, what would you think would be a good range as a percentage of dgm? and based upon your experience as an historian of these subjects, particularly related to the depression. >> well, there's quite a range of debt to gdp across the developed world, and a lot