What a strange thing to ask for a citation on when CEO pay, stock buy backs and corporate dividends are at all time highs while worker pay and honestly just affording to live continue to crater.
The normal conversation is that productivity growth has slowed and the divide has increased, not that more productivity creates lower outcomes in real terms.
https://www.bls.gov/productivity/images/labor-compensation-l...
Data is collected through the National Compensation Survey: https://www.bls.gov/respondents/ncs/