The values of the four observables, divided by those calculated using the analytical model, as functions of the common Hill exponent. The absolute values of the observables at the left-hand side of the figure (n=4) are close to those of the unsimplified model. Note that as n increases, the disagreement with the unsimplified model becomes worse. Note also that the analytical model is a very good approximation to the common Hill exponent model for large n, since for large n, we see the values approaching unity.