Abstract: Disclosed examples include providing encrypted identifiers identifying at least one of a device or a user of the device for sending to corresponding database proprietors; accessing user information corresponding to the encrypted identifiers, the user information received from the corresponding database proprietors; and associating the user information with at least one of a search term collected at the device or a media impression logged for media presented at the device.

Abstract: Methods and apparatus to collect distributed user information for media impressions is disclosed. An example method includes receiving an encrypted identifier and media impression information collected from a mobile device, sending the encrypted identifier to a database proprietor associated with collection of mobile device presence information at a merchant location, receiving user information associated with the encrypted identifier from the first database proprietor, and associating at least one of the merchant location or the user information with the media impression information.

Abstract: Disclosed examples involve sending an encrypted identifier to a corresponding database proprietor via a network communication from a server of an audience measurement entity, the encrypted identifier identifying at least one of a device or a user of the device; receiving user information corresponding to the encrypted identifier from the corresponding database proprietor; and associating the user information with at least one of a search term collected at the device or a media impression logged for media accessed via the device.

Abstract: Disclosed examples involve obtaining encrypted identifiers identifying at least one of a device or a user of the device, sending respective ones of the encrypted identifiers to corresponding database proprietors, receiving user information corresponding to the respective ones of the encrypted identifiers from the corresponding database proprietors, and associating the user information with at least one of a search term collected at the device or a media impression logged for media presented at the device.

Abstract: Disclosed examples involve sending an encrypted identifier to a corresponding database proprietor via a network communication from a server of an audience measurement entity, the encrypted identifier identifying at least one of a device or a user of the device; receiving user information corresponding to the encrypted identifier from the corresponding database proprietor; and associating the user information with at least one of a search term collected at the device or a media impression logged for media accessed via the device.

Abstract: Disclosed examples involve obtaining encrypted identifiers identifying at least one of a device or a user of the device, sending respective ones of the encrypted identifiers to corresponding database proprietors, receiving user information corresponding to the respective ones of the encrypted identifiers from the corresponding database proprietors, and associating the user information with at least one of a search term collected at the device or a media impression logged for media presented at the device.

Abstract: Disclosed examples involve receiving a plurality of first identifiers and a media identifier collected by a data collector installed at a mobile device in connection with an application. The first identifiers identify at least one of the mobile device or a user of the mobile device. The media identifier is indicative of media presented via the application at the mobile device. Encrypted identifiers are generated by encrypting the first identifiers. Respective ones of the encrypted identifiers are decodable by corresponding database proprietors to which the respective encrypted identifiers pertain. The encrypted identifiers are sent in association with the media identifier to an audience measurement entity.

Abstract: Disclosed examples involve receiving a plurality of first identifiers and a media identifier collected by a data collector installed at a mobile device in connection with an application. The first identifiers identify at least one of the mobile device or a user of the mobile device. The media identifier is indicative of media presented via the application at the mobile device. Encrypted identifiers are generated by encrypting the first identifiers. Respective ones of the encrypted identifiers are decodable by corresponding database proprietors to which the respective encrypted identifiers pertain. The encrypted identifiers are sent in association with the media identifier to an audience measurement entity.

Abstract: Methods and apparatus to collect distributed user information for media impressions is disclosed. An example method includes receiving an encrypted identifier and media impression information collected from a mobile device, sending the encrypted identifier to a database proprietor associated with collection of mobile device presence information at a merchant location, receiving user information associated with the encrypted identifier from the first database proprietor, and associating at least one of the merchant location or the user information with the media impression information.

Abstract: Disclosed examples involve decoding information from a mobile device into a plurality of encrypted identifiers identifying at least one of the mobile device or a user of the mobile device, sending ones of the encrypted identifiers to corresponding database proprietors, receiving a plurality of user information corresponding to the ones of the encrypted identifiers from the corresponding database proprietors, and associating the plurality of user information with at least one of a search term collected at the mobile device or a media impression logged for media presented at the mobile device.

Abstract: Disclosed examples involve decoding information from a mobile device into a plurality of encrypted identifiers identifying at least one of the mobile device or a user of the mobile device, sending ones of the encrypted identifiers to corresponding database proprietors, receiving a plurality of user information corresponding to the ones of the encrypted identifiers from the corresponding database proprietors, and associating the plurality of user information with at least one of a search term collected at the mobile device or a media impression logged for media presented at the mobile device.