I'm trying to apply a regression model based on the Human Capital Theory.

Besides other independent variables, I have grouped the educational level (in years) in 4 distinct variables, in the following way:

- E1: variable that assumes values 1, 2, 3 or 4 in the case of the worker have these educational levels. Assumes value 0 otherwise.

- E2: variable that assumes values 5, 6, 7 or 8 in the case of the worker have these educational levels. Assumes value 0 otherwise.

- E3: variable that assumes values 9, 10, 11 in the case of the worker have these educational levels. Assumes value 0 otherwise.

- E4: variable that assumes values 11 or above in the case of the worker have these educational levels. Assumes value 0 otherwise.

My question is: grouping educational level this way may cause any problems to my estimation?

Thanks!