Can you recommend potential sources of...

Can you recommend potential sources of {quantitative/qualitative} data and {performance/cost} metrics that should be incorporated in the report for evaluating the {return on investment (ROI)} of our rewards program? Furthermore, kindly offer {illustrations of benchmarks/research findings} that can be utilized as a reference to compare our program with {best practices/industry standards}. It would also be helpful if you could provide a breakdown of the {administrative costs/overhead} linked to th