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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Int Stat Rev. 2015 Mar 25;84(1):43–62. doi: 10.1111/insr.12100

Appendix 2.

: Values of β0, β1 and β2 for the second simulation study (40% response rate)

Corr(X.R) Corr(Z,R) β0 β1 β2
Low Low −1.40 0.05 0.05
Medium −3.20 0.06 0.22
High −21.35 0.13 1.90
Medium Low −3.20 0.22 0.06
Medium −5.05 0.23 0.23
High −30.90 0.64 2.32
High Low −21.35 0.13 1.90
Medium −30.90 2.32 0.64
High* −64.20 3.10 3.10
*

In this case the high level of Corr(X,R) and Corr(Z,R) is High ≈ 0.54.