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

Determining the pay level describe how it is done ?

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