METHODS AND APPARATUS TO CORRECT SEGMENTATION ERRORS
Methods, apparatus, systems and articles of manufacture are disclosed to correct segmentation errors. An example disclosed method includes identifying, with a processor, a segment group comprising observation data associated with two or more segments, respective ones of the two or more segments having a similar first characteristic and a dissimilar second characteristic, identifying first portions of the observation data having errors, generating a first matrix of binary indicators associated with the observation data, the binary indicators associating the first portions of the observation data with a first correction factor, and generating a value for the first correction factor by minimizing a residual sum of squares of the segment group observation data associated with the first matrix of binary indicators.
1 - 28 . (canceled)
29 . An apparatus to correct a data misclassification error in market observation data, the apparatus comprising:
a segment data retriever to identify a segment group including the market observation data, the market observation data associated with a first segment and a second segment, the first segment and the second segment exhibiting a shared consumer behavior characteristic and a dissimilar demographic classification characteristic;
a segment error identifier to identify a first portion of the market observation data including errors and a second portion of the market observation data not including the errors, the first portion to be identified based on a property of the market observation data in the first portion relative to an error threshold;
a matrix engine to determine a correction factor to be applied to the first portion of the market observation data;
a constraint engine to apply a constraint to the correction factor in response to the shared consumer behavior characteristic between the first segment and the second segment; and
a residual manager to apply the constrained correction factor the first portion of the market observation data to correct the misclassification error.
30 . The apparatus of claim 29 , wherein the property of the market observation data in the first portion includes at least one of a magnitude of data point values in the market observation data in the first portion or a range of data point values in the market observation data in the first portion.
31 . The apparatus of claim 29 , wherein the market observation data is further associated with a third segment, the segment error identifier to (a) identify the first portion of the observation market data based on the first segment, the second segment, and the third segment during a first iteration and (b) identify the first portion of the observation market data based on the first segment and one of the second segment or the third segment during a second iteration, and
further including a matching manager to select one of the first portion identified during the first iteration or the first portion identified during the second iteration for application of the constrained correction factor.
32 . The apparatus of claim 29 , wherein the constraint engine is to:
determine a first magnitude span value for the market observation data associated with the first segment during a first time period;
perform a comparison of the first magnitude span value to a second magnitude span value for the market observation data associated with the second segment during the first time period; and
apply the constraint to the correction factor in response to the comparison.
33 . The apparatus of claim 29 , wherein the matrix engine is to generate a first matrix of binary indicators associated with the market observation data, the binary indicators to associate the first portion of the market observation data with the correction factor, and wherein the residual manager is to determine a value for the correction factor by minimizing a residual sum of squares of the observation data associated with the matrix of binary indicators.
34 . The apparatus of claim 33 , wherein the correction factor is a first correction factor and wherein the matrix engine is to generate a second matrix of binary indicators, the second matrix of binary indicators to associate a third portion of the market observation data with a second correction factor.
35 . The apparatus of claim 29 , wherein the consumer behavior characteristic includes at least one of product purchases, brand purchase, media consumption, or travel.
36 . A tangible machine readable storage medium comprising machine readable instructions that, when executed, cause the machine to at least:
identify a segment group including market observation data, the market observation data associated with a first segment and a second segment, the first segment and the second segment exhibiting a shared consumer behavior characteristic and a dissimilar demographic classification characteristic;
identify a first portion of the market observation data including errors and a second portion of the market observation data not including the errors, the first portion to be identified based on a property of the market observation data in the first portion relative to an error threshold;
determine a correction factor to be applied to the first portion of the market observation data;
apply a constraint to the correction factor in response to the shared consumer behavior characteristic between the first segment and the second segment; and
apply the constrained correction factor the first portion of the market observation data to correct the misclassification error.
37 . The machine readable storage medium of claim 36 , wherein the property of the market observation data in the first portion includes at least one of a magnitude of data point values in the market observation data in the first portion or a range of data point values in the market observation data in the first portion.
38 . The machine readable storage medium of claim 36 , wherein the market observation data is further associated with a third segment and the instructions, when executed, cause the machine to:
identify the first portion of the observation market data based on the first segment, the second segment, and the third segment during a first iteration;
identify the first portion of the observation market data based on the first segment and one of the second segment or the third segment during a second iteration; and
select one of the first portion identified during the first iteration or the first portion identified during the second iteration for application of the constrained correction factor.
39 . The machine readable storage medium of claim 36 , wherein the instructions, when executed, cause the machine to:
determine a first magnitude span value for the market observation data associated with the first segment during a first time period;
perform comparison of the first magnitude span value to a second magnitude span value for the market observation data associated with the second segment during the first time period; and
apply the constraint to the correction factor in response to the comparison.
40 . The machine readable storage medium of claim 36 , wherein the instructions, when executed, cause the machine to:
generate a first matrix of binary indicators associated with the market observation data, the binary indicators to associate the first portion of the market observation data with the correction factor; and
determine a value for the correction factor by minimizing a residual sum of squares of the observation data associated with the matrix of binary indicators.
41 . The machine readable storage medium of claim 39 , wherein the correction factor is a first correction factor and wherein the instructions, when executed, cause the machine to generate a second matrix of binary indicators, the second matrix of binary indicators to associate a third portion of the market observation data with a second correction factor.
42 . The machine readable storage medium of claim 36 , wherein the consumer behavior characteristic includes at least one of product purchases, brand purchase, media consumption, or travel.
43 . An apparatus comprising:
memory including machine readable instructions; and
processor circuitry to execute the instructions to:
identify a segment group including market observation data, the market observation data associated with a first segment and a second segment, the first segment and the second segment exhibiting a shared consumer behavior characteristic and a dissimilar demographic classification characteristic;
identify a first portion of the market observation data including errors and a second portion of the market observation data not including the errors, the first portion to be identified based on a property of the market observation data in the first portion relative to an error threshold;
determine a correction factor to be applied to the first portion of the market observation data;
apply a constraint to the correction factor in response to the shared consumer behavior characteristic between the first segment and the second segment; and
apply the constrained correction factor the first portion of the market observation data to correct the misclassification error.
44 . The apparatus of claim 43 , wherein the property of the market observation data in the first portion includes at least one of a magnitude of data point values in the market observation data in the first portion or a range of data point values in the market observation data in the first portion.
45 . The apparatus of claim 43 , wherein the market observation data is further associated with a third segment and the processor circuity is to execute the instructions to:
identify the first portion of the observation market data based on the first segment, the second segment, and the third segment during a first iteration;
identify the first portion of the observation market data based on the first segment and one of the second segment or the third segment during a second iteration; and
select one of the first portion identified during the first iteration or the first portion identified during the second iteration for application of the constrained correction factor.
46 . The apparatus of claim 43 , wherein the processor circuity is to execute the instructions to:
determine a first magnitude span value for the market observation data associated with the first segment during a first time period;
perform comparison of the first magnitude span value to a second magnitude span value for the market observation data associated with the second segment during the first time period; and
apply the constraint to the correction factor in response to the comparison.
47 . The apparatus of claim 43 , wherein the processor circuity is to execute the instructions to:
generate a first matrix of binary indicators associated with the market observation data, the binary indicators to associate the first portion of the market observation data with the correction factor; and
determine a value for the correction factor by minimizing a residual sum of squares of the observation data associated with the matrix of binary indicators.
48 . The apparatus of claim 47 , wherein the correction factor is a first correction factor and wherein the processor circuity is to execute the instructions to generate a second matrix of binary indicators, the second matrix of binary indicators to associate a third portion of the market observation data with a second correction factor.