The Reserve Bank of India (RBI) Governor D. Subbarao, on Tuesday, proposed a Producer Price Index (PPI), which would measure the average change over time in the sale prices of domestic goods and services. “In its present structure, the Wholesale Price Index (WPI) does not capture the price movement of services. Also, it is a hybrid of consumer and producer price quotes,” said Dr. Subbarao, while addressing the sixth annual Statistics Day Conference, here.