Most likely values for ﹩V^{( P) }_{r}﹩ and z₀ for four pulsars using three different values of braking index. Three lines are shown for each value of braking index to designate the peak likelihood and the 68% confidence regions. Heavy solid lines: n = 4. Light solid lines: n = 3. Long dashed lines: n = 2.5. Dotted lines: n = 2.