Abstract: Methods and apparatus are disclosed to monitory online activity. An example apparatus includes at least one memory, instructions, and processor circuitry to execute the instructions to generate a first database to store first uniform resource locators collected from first client devices, the first client devices associated with panelists, generate a second database to store second uniform resource locators collected from second client devices, one or more of the second client devices associated with one or more unidentified users, associate at least one of the second uniform resource locators as online activity of a first panelist of the panelists based on at least a portion of one of the first uniform resource locators matching at least a portion of the one of the second uniform resource locators, and store an association of the online activity and an identifier, the identifier to identify the first panelist.

Abstract: Methods and apparatus are disclosed to monitory online activity. An example apparatus includes at least one processor, and memory including instructions that, when executed, cause the at least one processor to compare first uniform resource locators collected from a first client device of a known panelist with second uniform resource locators collected from second client devices associated with one or more users, the one or more users being unknown, and associate at least some of the second uniform resource locators as online activity of the known panelist based on ones of the first uniform resource locators matching at least portions of ones of the second uniform resource locators.

Abstract: Methods and apparatus are disclosed to monitory online activity. An example apparatus includes at least one processor, and memory including instructions that, when executed, cause the at least one processor to compare first uniform resource locators collected from a first client device of a known panelist with second uniform resource locators collected from second client devices associated with one or more users, the one or more users being unknown, and associate at least some of the second uniform resource locators as online activity of the known panelist based on ones of the first uniform resource locators matching at least portions of ones of the second uniform resource locators.

Abstract: Methods and apparatus are disclosed to monitory online activity. An example method includes storing a first uniform resource locator (URL) from a first client device with a meter, associated with a user, and storing a second URL from an un-known user of a second client device, the second client device not having a meter. The example method further including determining that the second URL from the second client device corresponds to online activity of the user based on the first URL matching at least a portion of the second URL, and in response to the determining, identifying the un-known user of the second client device as the user of the first client device. The example method further including when a valid cookie is not set on the second client device, setting a cookie on the second client device to identify it as being associated with the user.

Abstract: Methods and apparatus are disclosed to monitory online activity. An example method includes storing a first uniform resource locator (URL) from a first client device with a meter, associated with a user, and storing a second URL from an un-known user of a second client device, the second client device not having a meter. The example method further including determining that the second URL from the second client device corresponds to online activity of the user based on the first URL matching at least a portion of the second URL, and in response to the determining, identifying the un-known user of the second client device as the user of the first client device. The example method further including when a valid cookie is not set on the second client device, setting a cookie on the second client device to identify it as being associated with the user.

Abstract: Methods and apparatus are disclosed to monitory online activity. An example method includes collecting first uniform resource locators from a first client device having a meter. The example method also includes collecting second uniform resource locators from a second client device not having a meter. The example method also includes determining that ones of the second uniform resource locators from the second client device correspond to online activity of a user associated with the first client device based on ones of the first uniform resource locators matching at least portions of the ones of the second uniform resource locators. Additionally, the example method includes associating the second client device with the user of the first client device.

Abstract: Methods and apparatus are disclosed to monitory online activity. An example method includes collecting first uniform resource locators from a first client device having a meter. The example method also includes collecting second uniform resource locators from a second client device not having a meter. The example method also includes determining that ones of the second uniform resource locators from the second client device correspond to online activity of a user associated with the first client device based on ones of the first uniform resource locators matching at least portions of the ones of the second uniform resource locators. Additionally, the example method includes associating the second client device with the user of the first client device.

Abstract: An example method of collecting information on a mobile device about interactive gaming via a hosted service over the Internet involves monitoring usage of the mobile device. The monitoring is performed on the mobile device while the mobile device is being used for the interactive gaming. The example method also involves collecting usage information corresponding to the interactive gaming between the mobile device and a second end-user device in communication with the mobile device via the hosted service over the Internet.

Abstract: An example method to monitor online activity involves comparing first uniform resource locators collected from a first client device of a known panelist with second uniform resource locators collected from second client devices associated with different users; and determining which of the second uniform resource locators correspond to online activity of the known panelist based on ones of the first uniform resource locators matching at least portions of ones of the second uniform resource locators.

Abstract: An example method to monitor online activity involves comparing first uniform resource locators collected from a first client device of a known panelist with second uniform resource locators collected from second client devices associated with different users; and determining which of the second uniform resource locators correspond to online activity of the known panelist based on ones of the first uniform resource locators matching at least portions of ones of the second uniform resource locators

Abstract: An example method of collecting information on a mobile device about interactive gaming via a hosted service over the Internet involves monitoring usage of the mobile device. The monitoring is performed on the mobile device while the mobile device is being used for the interactive gaming. The example method also involves collecting usage information corresponding to the interactive gaming between the mobile device and a second end-user device in communication with the mobile device via the hosted service over the Internet.

Abstract: An example method of collecting information about usage of a mobile device involves monitoring first usage of the mobile device associated with accessing, via the mobile device, a first internet website of a communication service carrier providing a service subscription for the mobile device. The example method also involves monitoring second usage of the mobile device associated with accessing, via the mobile device, a second internet website not of the communication service carrier. The monitoring of the first and second usage is performed on the mobile device. First and second usage information about the first and second usage is collected. The first usage information indicates that the first internet website is an internet portal of the communication service carrier.