Hi, I am looking for an a-priori proof that money printing always raises overall prices (even if all the printed money is hoarded and not spent). (when I say “raises prices” I mean ceteribus paribus.) I don’t know if this is even true, but I am trying to prove it.
I have an idea and I am looking for comments or improvements.
Suppose that the central bank prints new money and gives it to A. Only three cases are possible: 1) A spends the money; 2) A invests (lends) the money; 3) A hoards the money.
We want to prove that prices will increase in all cases, in particular in case 3.
Case 1) A spends the new money on some good X. This is the easy case: we all know why the price of X will increase. (Demand for X increased, and supply has not increased, so the price for X must increase.) Then the seller of X in turn will have more money, which he is going to spend on some other good Y, so the price of Y will increase too, and so on.
Case 2) A lends the new money to some other person B. Then B has the new money and is faced with the same problem: he can either spend it, lend it, or hoard it. So we can ignore this case, because it must eventually resolve to case (1) or (3). Eventually, someone must either spend or hoard the money.
Case 3) A hoards the money (e.g. he keeps it under the mattress). This is the difficult case. We want to prove that even in this case some price will increase. How can this be, since A is not buying anything with the money? My answer: Even though A does not spend the money, something important has changed: A now has more money. So, money has now become less attractive to A (because he has more of it, and nothing else has changed). This is like saying that everything other than money (including leisure) has become more attractive to A. (Another way to say it is that his demand for money has decreased). This means that, in order to get the same amount of money as before, A will be willing to work less than before. Or, equivalently, it means that, to work the same amount of time as before, he will ask for more money than he did before. But to me this means that the price of A’s services has increased. In general, we can say that the overall price of labour has increased as a consequence of money printing. And since, as far as I can see, nothing else has changed, we seem to have proved that overall prices have increased, even in the case where all the money was hoarded and not spent.
If this analysis is correct, it seems we can state that money printing always increases prices. But is it correct? Are there other ways to get to the same conclusion? Thank you.