This .zip file contains graphic files (in .png format) of each chart and graph in the Economic Research Service report "On the Accuracy of Nielsen Homescan Data" (ERR-69), published in December 2008. The content and context of these files is as of the publication 
date of the report. After time, the material may not reflect the current ERS program of work, may be outdated, and/or superseded, so please visit the 
website to obtain the latest information: www.ers.usda.gov.

Any reuse of these images should include attribution to "Economic Research Service/USDA."

The following inventory lists each of the files in this folder.



File name		Description

(fig01.png)		Figure 1 - Stages in the data construction process
(fig02.png)		Figure 2 - Match quality in the data from the first step
(fig03.png)		Figure 3 - Bimodal distribution of r1
(fig04.png)		Figure 4 - Distribution of household matches
(fig05.png)		Figure 5 - Trip statistics
(fig06.png)		Figure 6 - Kernel densities of log price errors