There are several world-famous economists and business thinkers who have contributed to the field of sales and marketing with their theories and ideas. Here are a few notable figures along with their relevant theories on sales and marketing:

1. Philip Kotler:

2. Theodore Levitt:

3. Al Ries and Jack Trout:

4. Michael Porter:

5. Daniel Kahneman and Amos Tversky:

6. Robert Cialdini:

7. David A. Aaker:

8. Clayton Christensen:

These economists and business thinkers have contributed valuable insights to the field of sales and marketing. Their theories and ideas continue to shape the way businesses approach marketing strategies, consumer behavior, and effective communication with customers.