Appendix

A.4 EstimatingparameterswhenY(t)isunavailable New parameter estimators that leverage only the available data need to be derived whenY(t) is unavailable. The derivation goes as follows: first, we eliminateY(t) from the model equations. The squared error of the estimated parameters are shown in Figure 1. First, we estimated the parameters separately for each individual. Second, we performed statistical analysis to find associations between the estimated parameters and the demographic variables.