Coalescence parameter in jets, $B^{\rm Jet}_{2}$, and in the underlying event, $B^{\rm UE}_{2}$, as a function of $p_{\rm T}/A$ in comparison with the predictions from PYTHIA 8 with the Monash 2013 tune with a coalescence afterburner (left panel) and the reaction-based PYTHIA 8.3 model (right panel).