Using the economic concepts that explain differences in wages, discuss any three of the following points.
* Why does a chief executive earn more than a rocket scientist working for NASA?
* Why does a teacher earn less than a firefighter?
* Why does a union electrician earn less than a non-union electrician?
* Why does a white male earn more than a white female with the same level of education?
*Why does a movie actress like Angelina Jolie earn more than a movie actress from the 1940s?