Because GDP counts output produced within a country, it excludes production located:

1. The GDP definition fixes a geographic boundary. 2. GDP is the value of all final goods and services produced within a country. 3. That value is counted for a given year. 4. The phrase within a country is what sets the boundary. 5. Output produced outside that country is therefore excluded. _Source: OpenStax Principles of Macroeconomics for AP Courses 2e (CC BY 4.0), Ch 5 'The Macroeconomic Perspective'_