Methods and apparatus to de-duplicate impression information
An example apparatus includes at least one memory, instructions in the apparatus, and processor circuitry to execute the instructions to access first cookies and a plurality of user identifiers, the first cookies and the user identifiers corresponding to devices accessing media, determine an error between a first demographic estimate based on the first cookies forming a pattern and based on a second demographic estimate corresponding to the user identifiers, obtain impression information from a database proprietor, the impression information including second cookies, identify a subset of the second cookies that are associated with a same person based on the pattern, and associate impressions corresponding to the subset with the same person.
1. An apparatus, comprising:
at least one memory;
instructions in the apparatus; and
processor circuitry to execute the instructions to:
access first cookies and a plurality of user identifiers, the first cookies and the user identifiers corresponding to devices accessing media;
determine an error between a first demographic estimate based on the first cookies forming a pattern and a second demographic estimate corresponding to the user identifiers;
obtain impression information from a database proprietor, the impression information including second cookies;
identify a subset of the second cookies that are associated with a same person based on the pattern; and
associate impressions corresponding to the subset with the same person.
2. The apparatus of claim 1 , wherein the processor circuitry is to determine the error as an overcount of the first demographic estimate relative to a count of users based on the user identifiers.
3. The apparatus of claim 1 , wherein the second cookies are not uniquely associated with individual persons.
4. The apparatus of claim 1 , wherein the processor circuitry is to associate the impressions corresponding to the subset with the same person by reducing a number of unique users associated with the subset to be one unique user.
5. The apparatus of claim 1 , wherein the processor circuitry is to:
iteratively determine the error based on patterns identified from different portions of data payloads of the first cookies, the first cookies corresponding to the devices accessing the media via the Internet;
access the first cookies after a communication interface receives the first cookies via the Internet; and
store the first cookies in a storage device.
6. The apparatus of claim 1 , wherein the processor circuitry is to access the impression information after a communication interface receives the impression information from the database proprietor via the Internet, the impression information including the second cookies.
7. The apparatus of claim 1 , wherein the processor circuitry is to:
generate a character map based on data payloads of the first cookies, and
detect the pattern based on the character map.
8. A method, comprising:
accessing first cookies and a plurality of user identifiers, the first cookies and the user identifiers corresponding to devices accessing media;
determining an error between a first demographic estimate based on the first cookies forming a pattern and a second demographic estimate corresponding to the user identifiers;
obtaining impression information from a database proprietor, the impression information including second cookies;
identifying a subset of the second cookies that are associated with a same person based on the pattern; and
associating impressions corresponding to the subset with the same person.
9. The method of claim 8 , further including determining the error as an overcount of the first demographic estimate relative to a count of users based on the user identifiers.
10. The method of claim 8 , wherein the second cookies are not uniquely associated with individual persons.
11. The method of claim 8 , further including associating the impressions corresponding to the subset with the same person by reducing a number of unique users associated with the subset to be one unique user.
12. The method of claim 8 , further including:
iteratively determining the error based on patterns identified from different portions of data payloads of the first cookies, the first cookies corresponding to the devices accessing the media via the Internet;
accessing the first cookies after receiving the first cookies via the Internet; and
storing the first cookies in a storage device.
13. The method of claim 8 , further including receiving the impression information from the database proprietor via the Internet, the impression information including the second cookies.
14. The method of claim 8 , further including:
summing a plurality of first character maps to generate a second character map, the first character maps to identify character-to-location combinations of characters in data payloads of the first cookies, and
detect the pattern based on the second character map.
15. A non-transitory computer readable storage medium comprising instructions that, when executed, cause a machine to at least:
access first cookies and a plurality of user identifiers, the first cookies and user identifiers corresponding to devices accessing media;
determine an error between a first demographic estimate based on a potential pattern in the first cookies and a second demographic estimate based on the user identifiers;
obtain impression information from a database proprietor, the impression information including second cookies;
identify a subset of the second cookies that are associated with a same person based on the pattern; and
associate impressions corresponding to the subset with the same person.
16. The non-transitory computer readable storage medium as defined in claim 15 , wherein the instructions further cause the machine to determine the error as an overcount of the first demographic estimate relative to a count of users based on the user identifiers.
17. The non-transitory computer readable storage medium as defined in claim 15 , wherein the instructions further cause the machine to associate the impressions corresponding to the subset with the same person by reducing a number of unique users associated with the subset to be one unique user.
18. The non-transitory computer readable storage medium as defined in claim 15 , wherein the instructions further cause the machine to:
iteratively determine the error based on patterns identified from different portions of data payloads of the first cookies, the first cookies corresponding to the devices accessing the media via the Internet;
access the first cookies after a communication interface receives the first cookies via the Internet; and
store the first cookies in a storage device.
19. The non-transitory computer readable storage medium as defined in claim 15 , wherein the instructions further cause the machine to access the impression information after a communication interface receives the impression information from the database proprietor via the Internet, the impression information including the second cookies.
20. The non-transitory computer readable storage medium as defined in claim 15 , wherein the instructions further cause the machine to:
generate a character map based on data payloads of the first cookies, and
detect the pattern based on the character map.