The developed and developing countries showed that high and unpredictable inflation is not good for growth, employment, and equal distribution of real income in the long run. Also it can't patronize stronger growth, external competitiveness or employment on a sustainable basis. People having high income or wealth can protect themselves against inflation. That's why inflation targeting becomes an effective policy framework to reduce the inflation.
The relationship between financial activity and the real economy has been affected seriously by the innovations in financial products and financial markets. That's why money and credit aggregates became less acceptable or trustworthy as a target for inflation. In many countries, the correlation between money and inflation was getting unstable in the short run. This was the main reason for what inflation targeting was invented in advanced countries. In many countries, inflation targeting was less risky than targeting a monetary aggregate.
The global integration of goods and financial markets has impacted the changes in monetary policies.
Inflation Targeting in the World