Observables Probing the Perturbative-Nonperturbative Transition Region in QCD

Benefiting from the high statistics from $e^{+}{e}^{-}$ experiments at the $Z^0$ resonance, it is possible to impose strong two-jet cuts on the data without losing the statistical significance. In these events perturbative activity is suppressed and hadronization effects can be more prominent. I give two examples of observables that can be important tools for a more detailed study of the hadronization mechanism.