From the wikipedia article:
"Controversy
Reich's analyses on the effects of minimum wage increases in his capacity at IRLE have generated controversy and accusations of bias from Los Angeles city legislators. Addressing IRLE's selection to analyze a proposed minimum wage hike in Los Angeles to $15.25, Democratic City Councilman Felipe Fuentes argued that "the selection of U.C. Berkeley, by perception, compromises the possibility of a fair and balanced discussion." Fuentes and fellow Democratic Councilman Mitch O'Farrell asked to reopen the selection process for a research team "so that we can engage in a process that is worthy of our employers, workers and their families, and the well-being of our economy."[14]
In March 2016, the Albany Times Union reported on hundreds of pages of emails from Reich’s research team that showed a close collaboration between the research team and labor union groups that fund the movement to raise the minimum wage. According to the article, “the relationship between academic and funder seemed explicit” with one uncovered email showing that the research team was seeking grant money to support its research "for local groups engaged in work to raise the minimum wage" and “testimony/media work” in California.[15]"
When you are getting accused of bias by Democrats, things are pretty bad.