Producer Price Inflation measures the changes in the prices of locally produced commodities. The Producer Price Index (PPI) is defined as “A measure of the change in the prices of goods either as they leave their place of production or as they enter the production process.”
The Producer Price Index for Mining includes:
◦ Coal and gas
◦ Gold and other metal ores
◦ Non-ferrous metal ores
◦ Stone quarrying, clay and diamonds