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. Author manuscript; available in PMC: 2020 Dec 9.
Published in final edited form as: J R Stat Soc Ser C Appl Stat. 2019 Aug 2;68(5):1465–1483. doi: 10.1111/rssc.12371

Fig. 1.

Fig. 1.

MUBP(ϕ) from the probit model and MUB(ϕ) from the normal model versus the true estimated bias, shown for combinations of the biserial correlation corr(U, X)=ρux (rows) and the selection mechanism (columns), for E[Y]=0.3 (results are medians across 1000 simulated data sets for each scenario): ●, probit, MUBP(0); ▲, probit, MUBP(0.5); ■, probit, MUBP(1); ○, normal, MUBP(0); △, normal, MUBP(0.5); □, normal, MUBP(1); – – –, equality (index=estimated bias)