Discuss in details about the external competitiveness Determining the pay level describe how it is done ?

I would like to talk in details about the external competitiveness: Determining the pay level
describe how it is done ? what are the strategies and how it is shaped?

Use the English premier league as an example and apply it to the research

Use as many sources as you need, I wont say how many

Please please please , be creative and think deeply and try to avoid unnecessary mistakes
Its about quality to me not quantity