I want to check whether a substitution effect among two variables exists.
In the models that I have estimated these have been set as independent variables. Each model has 1 "main" dependent variable and a series of control ones.
I want to perform a t-test to compare the coefficient of each model against the other. This way, based on the p-value, I can assume that I'm not talking apples and oranges, and that even if I cant calculate the magnitude of this substitution effect, I can at least prove it exists.
The problem is that I don't know how to perform the t.test in R on the coefficients.