What is the difference between Gross National Product (GNP) and Gross National Income (GNI)?

Gross National Product (GNP) measures the total value of goods and services produced by a country's residents, regardless of where they are located. Gross National Income (GNI) includes the total income earned by a country's residents, both domestically and abroad. The main difference is that GNP focuses on production, while GNI includes income earned from production.