The rate of inflation is the measure of the rise in prices of goods and services in an economy over a certain set time period. When prices rise, for the same level of income, the consumer can purchase less, which means they have less purchasing power and are “poorer” compared to the previous time period. The inflation rate is the annualized level of price changes. Excessive growth of the money supply is one cause of inflation. When the government adds more money to an economy, it devalues each bill already in circulation, lowering the value, as it now will take more money to purchase the same good or service. The inflation rate is not a problem if it is very low, but once it escalate,s it causes severe economic problems.