The Cost-of-Living Stat, also known as the Consumer Price Index (CPI), is a measure of the average change in prices over time for goods and services. It is used to compare the cost of living between different countries or regions. The CPI is calculated by taking a basket of goods and services that represent the typical purchases of a household and measuring the changes in their prices over time. This data is then used to determine the overall cost of living in a particular area.