Methods and apparatus to correct errors in audience measurements for media accessed using over-the-top devices

A non-transitory machine readable storage medium comprising instructions that, when executed, cause processor circuitry to at least:

• obtain first demographic impressions corresponding to a database proprietor and second demographic impressions corresponding to a panelist database;
• determine a portion of the first demographic impressions that includes first demographic information that does not match second demographic information of the second demographic impressions;
• determine a difference between the first demographic information of the portion of the first demographic impressions and the second demographic information of the second demographic impressions;
• and
• train a model based on the difference between the first demographic information and the second demographic information, the model to correct third demographic impressions logged by the database proprietor.

A method comprising:

• obtaining first demographic impressions corresponding to a database proprietor and second demographic impressions corresponding to a panelist database;
• determining, by executing an instruction with a processor, a portion of the first demographic impressions that includes first demographic information that does not match second demographic information of the second demographic impressions;
• determining, by executing an instruction with the processor, a difference between the first demographic information of the portion of the first demographic impressions and the second demographic information of the second demographic impressions;
• and
• training, by executing an instruction with the processor, a model based on the difference between the first demographic information and the second demographic information, the model to correct third demographic impressions logged by the database proprietor.