In order to address this aspect transparently, we find it reasonable
to apply a neutral value (zero) as a base assumption in the
main results and then determine a break-even value for the sorting
time in which both scenarios resulted in identical social costs, i.e.
same value of Societal LCC. It should be mentioned that quantification
of externality costs related to source segregation is beyond the
scope of this investigation, and the break-even value only represents
a ‘‘turning point’’ between the two situations. In this case
study, the analysis revealed that that the turning point corresponded
to a value of 1.20 €/h (13 h/year/household, according
to Bruvoll et al., 2000), i.e. to balance the extra costs of treating
organic waste separately, households should be willing to spend
time on sorting. And the benefit from sorting should correspond
to a value larger than 1.20 €/h.