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. Author manuscript; available in PMC: 2009 Apr 15.
Published in final edited form as: Int J Biostat. 2008;4(1):artno4.

Table 1.

Bias and root mean square error (RMSE) of various estimators of ρA in two different scenarios

Estimator Bias RMSE
Scenario 1: (βW=(1,0.5)T)
Path Analysis 0.872 0.872
2SLS -0.001 0.122
3SLS 0.002 0.122
Scenario 2: (βW=(1,0)T))
Path Analysis 0.970 0.970
2SLS 0.000 0.051
3SLS 0.001 0.039