Here is Scott:
These are important points, and not just for Japan.There’s a lot of speculation about how Abenomics will work out in the long run. I don’t like much of this speculation, because it seems to conflate four quite distinct questions:1. Can the BoJ boost nominal aggregates? I.e. is Japan stuck in a liquidity trap?2. Will the BoJ succeed in reaching its 2% inflation goal?3. Would higher inflation lead to better outcomes for the real economy?4. If 2% inflation is achieved, will Japan experience good times?Before proceeding, let me indicate that I think the answers are:1. Yes, definitely.2. Probably not.3. Probably.4. Probably not.
- If you're sympathetic to market monetarist thinking (and I am), then it's obvious that 'liquidity traps' exist only to the extent that policy makers believe in them and are bound by ineffective policy tools (i.e. short term nominal interest rate manipulation). If you have a fiat currency, you can always devalue to reach a nominal income target.
- The real uncertainty is in the will. It is a very different sort of question that brings in the influence of institution-specific structures, history, and politics. The BoJ has a long history of extreme conservatism and has repeatedly tightened monetary policy prematurely. Expectations theory implies that a change in policy must be perceived as permanent to be effective; temporary increases in the money supply have no effect. If there is any substance behind claims that Fed monetary policy is ineffective, this is the mechanism.
- If an economy is in long-run equilibrium, then this answer would be no. After a large debt-deflation spiral (aka decline in NGDP), then the answer is yes. Higher inflation will erode any wage stickiness and reduce the burden of nominal debt (debt/NGDP ratio goes down). Some people would call this a haircut, which is a fair but myopic point. Real returns may take a haircut, but the long run credit quality is improved because the risk of outright default (and much larger haircuts!) is significantly reduced.
Lars does a very good job of going into why #4 is "Probably no". Market monetarists often get accused of thinking NGDP targeting is a panacea, but this shows our innocence. Monetary policy can fix problems caused by bad monetary policy. Supply side problems still require supply side solutions.