NOTE
Inflation
English translation of the original VNote “Inflation”, preserving its structure with only necessary small corrections.
This is a historical learning note and may contain outdated or incomplete understanding.
Note: This preserves the original VNote structure and wording as much as possible. Only clear errors or statistical/institutional definitions that have changed are corrected.
1. Why Do Countries Expand the Money Supply to Support Economic Growth?
1.1. How Much Money Is Needed?
Using the Fisher equation: quantity of products * product price = money in circulation * velocity. MV=PY is an identity; causal claims about inflation require additional assumptions about velocity, real output, and money demand.
1.2. Why Not Print Too Much Money?
Under the simplified assumptions in the example, a much larger money supply with unchanged real output and velocity raises the price level. In reality, it does not imply a fixed one-to-one inflation outcome.
1.3. Why Not Print Too Little Money?
Under the simplified assumptions, if product quantity rises without a corresponding increase in money, the price level falls—deflation in the example.
1.4. Why Can Moderate Inflation Accompany Economic Growth?
Moderate and stable inflation can coexist with normal demand growth and lower real debt burdens, but rising prices do not automatically cause production and consumption to increase. High or unstable inflation has significant costs.