updated: added the summation of the factors for a -1.5 deflation rate.
I’m sure most people have heard that increasing how much money is going around generally increases prices (and the opposite holds true). Economists have a formal method for explaining this phenomenon:
M * V = P * Y
he model’s variables are aggregates representing different aspects of the economy. M is how much money there is (though unclear as to what money is). V is Velocity which is s how quickly money is circulating, this variable can tell you quite a bit about the economy and confidence. P is the price level of the economy (Consumer price index is a proxy for consumer), and Y is the total output (Gross Domestic Product is a proxy).
You generally have to get it logged so you can work in growth rates which help tell you better where the economy is heading. So that gives:
m + v = p + y
To clarify, that means that if GDP grows by 10% then y would be 10%. Rearranging for the price level gives us:
m + v – y = p
Now it’s just a question of plugging the right numbers in to predict what inflation will be. Money velocity is expected to be dropping by about 2.5% because of broken financial institutions and lack of confidence in the economy. GDP growth rate in the Eurozone is up for debate but for the sake of argument let’s say its 2%. The ECB is unwilling to be expansionary (thanks to Germany’s hyperinflation phobia) so money growth seems to be about 3%.
3 – 2.5 – 2 = -1.5
So why is this bad? Because when people expect deflation, they end up waiting more (since they expect their money to buy more in the future). This means that economic activity decreases even further and sends the economy further down a depressionary spiral. This includes not only consumers but investors, since consumers won’t be spending, investors won’t find fruitful projects. This comes back in the form of less stuff and less employment. This is not to say that the marginal effect of a deflation movement from 1 to 0 is worse than one from 0 to -1, but generally speaking, the more deflation, the worse things will be.
Money velocity and GDP can be affected by fiscal stimulus that is, government spending more money. You can also affect velocity by increasing confidence in the markets which makes people not hoard cash as much. But both of these seem unrealistic in the Eurozone with its lack of political union where everyone seems to be obsessed with austerity. An easier solution would be for the ECB to say we are going to increase how much money there is in the economy by 10%, since money is something they directly control this is very easy to do, just print more money, but that won’t even be necessary, as long as they say it out loud, investors and consumers will all know to expect inflation and will invest or spend in the economy.
A note: the expansionary monetary policy would also allow government debt to become more sustainable which makes the other options easier to do.