Tue 2010-06-01 17:29 EDT
billy blog >> Blog Archive >> In the spirt of debate ... my reply
...Steve Keen and I agreed to foster a debate about where modern monetary theory sits with his work on debt-deflation. So yesterday his blog carried the following post, which included a 1000-odd word precis written by me describing what I see as the essential characteristics of modern monetary theory. The discussion is on-going on that site and I invite you to follow it if you are interested. Rather than comment on all the comments over on Steve's site, I decided to collate them here (in part) and help develop the understanding that way. That is what follows today... We distinguish the horizontal dimension (which entails all transactions between entities in the non-government sector) from the vertical dimension (which entails all transactions between the government and non-government sector)...A properly specified model will show you emphatically that the horizontal transactions between household, firms, banks and foreigners (which is the domain of circuit theory) have to net to zero even if asset portfolios are changing in composition. For every asset created there will be a corresponding liability created at the same time...you will make errors if there is not an explicit understanding that in an accounting (stock-flow) consistent sense all these transaction will net to zero. In adopting this understanding you might abstract from analysing the vertical transactions that introduced the high-powered money in the first place, but never deny its importance in setting the scene for the horizontal transactions to occur. I think the differences between Steve's models and modern monetary theory are two-fold. First, I do not think that Steve's model is stock-flow consistent across all sectors. By leaving out the government sector (even implicitly) essential insights are lost that would avoid conclusions that do not obey basic and accepted national accounting (and financial accounting) rules. This extends to how we define money. Second, I think Steve uses accounting in a different way to that which is broadly accepted. It might be that for mathematical nicety or otherwise this is the chosen strategy but you cannot then claim that your models are ground in the operational reality of the fiat monetary system we live in. I have no problem with abstract modelling. But modern monetary theory is firmly ground in the operational reality and is totally stock-flow consistent across all sectors. If we used the same definitions and rendered Steve's model stock-flow consistent in the same way as modern monetary theory then Steve's endogenous money circuits would come up with exactly the same results as the horizontal dimensions in modern monetary theory. His results might look a bit different in accounting terms but most of the message he wishes to portray about the dangers of Ponzi stages in the private debt accumulation process would still hold.