 To explore this hypothesis , I extend the classical SIRD model to incorporate conditional quarantine and  two groups of agents : the majority and the corona sceptics, where the latter are less inclined to get tested and engage in social distancing.
<meaning-changed>  To explore this hypothesis , I extend the classical SIRD model to incorporate conditional quarantine and  two groups of agents : the majority and the corona sceptics, where the latter are less inclined to get tested and engage in social distancing.
 To explore this hypothesis , I extend the classical SIRD model to incorporate conditional quarantine and heterogeneous mixing of two groups of agents : the majority and the corona sceptics, where the latter are less inclined to get tested and engage in social distancing.