Correlation between propensity and revisit probability
Maximization of \(\bar{\rho}_{\text{final}}\)  0.85
Minimization of \(\text{S}^{2}_{\rho_{\text{final}}}\) -0.97
Minimization of \(\text{S}_{\rho_{\text{final}}}/\bar{\rho}_{\text{final}}\) -0.97
Random (uninformed) fieldwork Constant revisit probability