A report drafted by researchers at UMass Amherst says it’s hard to say how much impact the state’s three casinos have had on commercial real estate in their area.

The report, from The Social and Economic Impacts of Gambling in Massachusetts research team at the university, was delivered at the most recent meeting of the state’s gaming commission.

The authors said it was particularly hard to gauge the impact of Plainridge Park Casino — the state’s oldest legal gaming venue — on its host town of Plainville and surrounding communities since Plainridge opened in June of 2015 because of the small number of commercial properties involved. “(I)t is difficult to discern whether the construction of Plainridge Park Casino had any bearing on commercial sale prices in the area…,” the report said.