Why is GDP more commonly used?

Related questions

1. Is Tibet in Bhutan?
2. Why GDP is more important than GNP?
3. What is the unemployment rate in Bhutan?
4. Where did Gross National Happiness originated?
5. What type of economy does Bhutan have?
6. What is meant by Gross National Happiness in Bhutan?
7. Is Gnh better than GDP?
8. How does Bhutan measure Gross National Happiness?
9. What does Gross National Happiness measure?
10. What are the four pillars of Gross National Happiness?

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14. #growth
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16. #prices
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19. #called
20. #because