[1] Mainstreet Research conducts regular Canadian national, regional, and municipal public polling and private market and public opinion research.
[52][53] A report commissioned after the election by the Market Research and Intelligence Association (MRIA) found that there were flaws in the company's polling methods, one of which resulted in the exclusion of cellphones in polling calls.
This led to sampling bias, as younger people tended to have cellphones, but not landlines.
It was found that the pollster's attempts to conduct ward-by-ward polling was based on phone numbers linked to postal codes, while cellphones with no such linkage were often dropped.
[53][54] Mainstreet Research president Quito Maggi later admitted to "big, big polling failures", and stated that while the company has implemented recommendations from the report, it would have to work to earn back public trust.