According to wikipedia, "overdetermination is a phenomenon whereby a single observed effect is determined by multiple causes at once, any one of which alone might be enough to account for ("determine") the effect.That is, there are more causes present than are necessary to generate the effect". In this strictly technical sense Japan's deflation problem is overdetermined - there are multiple causes at work, any one of which could account for the observed phenomenon. Those who have been following the debate can simply choose their favourite - balance sheet recession, liquidity trap, fertility trap - each one, taken alone, could be sufficient as a cause. The problem this situation presents is simply epistemological - in a scientific environment the conundrum could be resolved by devising the requisite, consensually grounded, tests.
But I would here like to use the term "overdetermination" in another, less technical, sense, since it seems to me Japan's problem set is overdetermined in that we always seem to be facing at least one more problem than we have remedies at hand.
The case of the country's ongoing energy dependency which is producing a growing trade and current account deficit would be a good example. Notionally the problem forms part of the legacy of the tragic tsunami which hit the country in March 2011 and lead to the decision to phase out nuclear energy capacity. But now that decision has been reversed, and starting this summer nuclear generating capacity is once more to be "phased up". The issue is, from a strictly economic point of view would that be good news? Well, it would certainly help with the deteriorating trade balance:
But what about deflation? Would having cheaper domestically produced energy help here? Wasn't generating inflation supposed to be the whole point of the Abenomics exercise? Don't rising energy costs constitute the lions share of the country's recent, much heralded, inflation? Damned if I do, and damned if I don't would seem to be the only conclusion to draw. A win-win policy which both closes the trade deficit and foments inflation (if that's what you think Japan needs) doesn't seem to be on the table. The trade deficit could also be corrected by reducing the fiscal deficit, but that would lower domestic demand, possibly send the economy back towards recession and almost certainly ignite deflation yet one more time.
The remainder of this post can now be found in my Kindle e-book published with Amazon.
You don't need to buy a Kindle to read this book. You can download a free app from Amazon.
Edward Hugh has a lively and enjoyable Facebook community where he publishes frequent breaking news economics links and short updates. If you would like to receive these updates on a regular basis and join the debate please invite Edward as a friend by clicking the Facebook link at the top of the right sidebar.