Nominal GDP (gross domestic product) is a measure of economic production for a country. It includes inflation, which allows nominal GDP to use current prices or the price that products and services are sold for during that year. This is in contrast to real GDP, which does not include inflation, making nominal GDP a higher value than real GDP. Nominal GDP can be compared from quarter to quarter during a single year. To compare GDP across different years, real GDP must be used. To compare GDP across years also requires a base year.