VESTED INTEREST BIAS:
Another name for Bias Due to Conflicts of Interest (synonym)1; which is a distortion of estimates, interpretations, or conclusions due to a compromise of a person’s objectivity when that person has a vested interest(s). Also see: Bias Due to Conflicts of Interest, Commercial Bias, Research Commissioning Bias, Interpretive Bias, and Investigator Bias.
Reference:
1. Earl-Slater A. The Handbook of Clinical Trials and Other Research. Abingdon: Radcliffe Medical Press Ltd. 2002. (Link to Reference)