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Results of data simulation showing unbiased estimate from two-stage least-squares regression in the presence of confounding.
| Model | Beta (95% CI)a |
|---|---|
| Y on X (linear regression) | 0.26 (0.25, 0.28) |
| Y on X (two stage least squares) | −0.29 (−0.37, −0.21) |
True value of beta from simulation is −0.3.
