This is amazing: RCT finds simple, 4-hour manager's #Mentalhealth training program saves $10 for every $1 spenthttp://www.thelancet.com/journals/lanpsy/article/PIIS2215-0366(17)30372-3/fulltext?rss=yes …
I'm not sure I see what you mean. The sick leave amount was taken from financial systems, not ascertained by managers or employees
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Who knows how, but if bias can creep in it will. The battle against bias is never-ending.
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That doesn't seem like a strong argument against the results to me. I can't see how it would bias the experiment at all
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Perhaps bad managers differentially withdrew from intervention group.
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That's certainly possible, but given that both intervention and control groups experienced similar drop out rates it seems unlikely
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