The article looks at very high inflation rates in countries since 1947. They found that about 20% of countries have had inflation rates over 100% per year. Higher inflation tends to be more unstable, and countries with high inflation often have a strong link between fiscal balance and seigniorage. Inflation inertia decreases as average inflation goes up, and high inflation is linked to poor economic performance. Stabilizing high inflation using the exchange rate can boost the economy.