Therefore, if the number of years of experience is held constant, then is the difference between the presence of a college degree or lack there of. Thus, if , on average the employee with a college degree will have a higher annual salary than one without a college degree. This can be seen in Figure 3.
when 
(has a degree)
is the difference between the presence of a college degree or lack there of. Thus, if 
, on average the employee with a college degree will have a higher annual salary than one without a college degree. This can be seen in Figure 3.