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Fig. 3.

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Marginal posterior probability on H0. Grey curves: Individual lens P(H0|di) obtained from Eq. (25) assuming flat priors on the lens model parameters, for ten time-delay lenses. Cyan curve: Statistical combination of the marginal posterior probabilities from the 100 time-delay lenses obtained following Eq. (26). Filled purple histogram: Hierarchical inference from Sect. 5.1 Red histogram: Hierarchical inference with a prior from Paper I, from Sect. 5.2. The vertical dashed line marks the true value of H0 used to simulate the data.

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