The GDP Deflator Explained

Key Takeaways

1. 1The GDP deflator measures price changes for all goods and services in GDP, broader than the Consumer Price Index
2. 2It's calculated as the ratio of nominal GDP to real GDP, expressed as an index number (base year = 100)
3. 3The GDP deflator grows whenever prices rise across the economy; falling deflator values indicate deflation
4. 4It differs from CPI because it includes investment goods, government purchases, and exports not captured in consumer price indices
5. 5The deflator is constantly revised as statisticians get better data on both nominal and real GDP
6. 6Annual GDP deflator inflation typically runs 1.5–2.5% in developed economies in normal times
7. 7Understanding the deflator helps you interpret real GDP reports and distinguish price-driven growth from production-driven growth