Q. the effects of work–life imbalance and the benefits of work–life balance
Thank you for contacting the Online Library. For your question, I recommend using ProQuest Central, a comprehensive, multi-disciplinary database. You can access it by clicking on the "find articles & more" tab on the home page. Do an advanced search and be sure to check the full-text box and the peer-reviewed, if you need scholarly articles. Some examples of searches include:
effects AND work-life AND imbalance (you may need to do work balance with quotes)
benefits AND work-life AND balance
I recommend also using synonyms for these words, e.g. positives, results, consequences, multiple responsibilities.
Please let us know if you need anything else.
Kristin M. Kozusko, MLIS