The consumer price index is a weighted average collection of the prices of common goods and services. Changes in the CPI over time are used to estimate the rate of inflation. The consumer price ...

Average prices for each item are aggregated and used to calculate the CPI with complex statistics. Everything included in the index is mathematically weighted so that each item or category’s ...

The PPI is a measure of the weighted average price of all first-stage goods (like metals, lumber, and natural gas) produced in the U.S. The producer price index ... time can be used to estimate ...