GDP - Gross domestic product is a measure if the final goods and services produced in their economy over a period of time. Economist use the word final in the definition of GDP because they are not counting unfinished products or services. An example often used to show a good that is not final is a car rental company. If Enterprise was sold a car from Ford for their rental car fleet, it is not a final good because it will be rented out to a customer. Enterprise is not the final consumer in the process.