Mean Bias on Propensity Score Matching

[Imam Agus Faisal]

Hi, so I am using - psmatch2 - to analyze my data, after I got the results, I use - pstest - and I got this result:

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Sample | Ps R2 LR chi2 p>chi2 MeanBias MedBias B R %Var
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Unmatched | 0.123 4350.28 0.000 24.6 13.8 88.8* 0.46* 100
Matched | 0.001 79.15 0.000 2.0 2.2 7.2 1.06 67
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I know that I supposed to look at the Mean Bias, but is there any literature or research that recommends a good Mean Bias or tolerable Mean Bias?