Methods and apparatus to expand panelist enrollment

A computer implemented method comprising:

• obtaining first media monitoring data and a first network signature generated by a media presentation device during a first period, the first media monitoring data indicative of media presented by the media presentation device during the first period and the first network signature indicative of one or more first network devices sharing a first local area network with the media presentation device during the first period;
• obtaining second media monitoring data and a second network signature generated by the media presentation device during a second period, the second media monitoring data indicative of media presented by the media presentation device during the second period and the second network signature indicative of one or more second network devices sharing a second local area network with the media presentation device during the second period, wherein the one or more second network devices are different from the one or more first network devices;
• determining, based on the first network signature, a first location of the media presentation device during the first period, and associating the first location with the first media monitoring data;
• and
• determining, based on the second network signature, a second location of the media presentation device during the second period, and associating the second location with the second monitoring data.

A non-transitory computer readable medium having stored therein instructions that, when executed by at least one processor, cause performance of a set of operations, the set of operations comprising:

• obtaining first media monitoring data and a first network signature generated by a media presentation device during a first period, the first media monitoring data indicative of media presented by the media presentation device during the first period and the first network signature indicative of one or more first network devices sharing a first local area network with the media presentation device during the first period;
• obtaining second media monitoring data and a second network signature generated by the media presentation device during a second period, the second media monitoring data indicative of media presented by the media presentation device during the second period and the second network signature indicative of one or more second network devices sharing a second local area network with the media presentation device during the second period, wherein the one or more second network devices are different from the one or more first network devices;
• determining, based on the first network signature, a first location of the media presentation device during the first period, and associating the first location with the first media monitoring data;
• and
• determining, based on the second network signature, a second location of the media presentation device during the second period, and associating the second location with the second monitoring data.