Coppola Comment

This post was originally published on Pieria in December 2013. Since then, the idea that the long-term real equilibrium interest rate must be equal to or lower than the long-term sustainable growth rate has become much more mainstream. I am just amazed that anyone ever thought it could be otherwise. A long-term real interest rate persistently above the sustainable growth rate cannot possibly be an "equilibrium" rate. As I show in this piece, it can only be maintained through rising inequality. It is by definition ponzi and therefore unsustainable. Periodic financial crashes are inevitable in any system in which growth does not cover the interest on debt.  Three years ago, Nick Rowe produced this post describing a “weird world” – a world in which the equilibrium interest rate is at or below the long-term growth rate of the economy, rather than above it as we are used to. In such a world, bubbles are inevitably created as investors search for positive yield. This is al...

I can't resist this. Blithely ignoring the utter mess he and his developers have managed to make of the cryptocurrency Ethereum, Vitalik Buterin has written a post on inflation and monetary policy. Wow. Is there no end to his talents? In this case, there is most definitely an end. Economics 101 is the end, pretty much. I don't claim to be the world's greatest economic expert - not by a LONG way - but the errors in this piece leapt out at me.  Firstly, inflation. Here is Buterin on inflation: The primary expense that must be paid by a blockchain is that of security. The blockchain must pay miners or validators to economically participate in its consensus protocol, whether proof of work or proof of stake, and this inevitably incurs some cost. There are two ways to pay for this cost: inflation and transaction fees. Currently, Bitcoin and Ethereum, the two leading proof-of-work blockchains, both use high levels of inflation to pay for security; the Bitcoin commu...