Posterior likelihoods for the transition width Δ and the values of the dark energy equation of state in the asymptotic past, w_i and the present day, w₀, with the other parameters marginalised, in the three-parameter version of the L model. The black solid and green dashed lines correspond respectively to the cases of logarithmic and uniform priors on w_i, as detailed in the text; for comparison the likelihood for the case of a constant w_i = 0 is also shown by the red dotted lines. In all cases the Hubble constant has been kept fixed at H₀ = 70 km s⁻¹ Mpc⁻¹.