ELI5: Explain Like I'm 5

Colin Clark (economist)

Have you ever heard of the game "I Spy"? You know how you have to find certain things in a picture? Well, a man named Colin Clark liked to play "I Spy" but with numbers instead of pictures. He wanted to find out how much money different countries were making and how they were spending it.

Colin Clark was really good at finding and organizing all of these numbers. He was so good, in fact, that he became a very famous economist (a person who studies how money is made, spent, and distributed).

One thing that Colin Clark was known for was studying something called the "production function". This is just a fancy way of saying that he wanted to figure out how much stuff (goods and services) a country could make with the resources (like workers and machines) they had.

Another thing that made Colin Clark famous was a chart that he made called the "Clark Spiral". This chart showed how different countries were growing and changing over time. He was able to use this chart to predict which countries would be rich and which countries would be poor in the future.

Overall, Colin Clark liked to play "I Spy" with numbers and used his special skills to help people understand how money works in different countries.