What are the three main sources for economic growth in any economy?

Definition Definition Increase in the amount of goods and services produced by a country in a given period of time compared to an earlier period. Economic growth is generally coupled with a rise in national income or the purchasing power of individuals. It is often measured in terms of the increase in a country's gross domestic product (GDP), or the overall monetary value of all the complete or final services and goods that a country can produce within its domestic boundaries in a specific period.