Phenomenology of IR-Renormalons in inclusive processes

We have compared the existing experimental data on the leading power corrections to the structure functions $F_2(x,Q^2)$ and $F_3(x,Q^2)$ with the the IR-renormalon model predictions for higher-twist contributions. The comparison with the existing data shows that the model can account for about 30% of the magnitude of higher-twist corrections to the structure functions $F_2^p$ and $F_2^d$, and that it is unlikely that the situation improves when the yet unknown flavor-singlet contribution is taken into account. In the case of the structure function $F_3$ we have found that the renormalon model describes correctly the magnitude of higher-twist effects.