@article \{gr0005,
author = "Cox, N. J.",
title = "Speaking Stata: Graphing agreement and disagreement",
journal = "Stata Journal",
publisher = "Stata Press",
address = "College Station, TX",
volume = "4",
number = "3",
year = "2004",
abstract = "Many statistical problems involve comparison and, in particular, the
assessment of agreement or disagreement between data measured on identical
scales. Some commonly used plots are often ineffective in assessing the
fine structure of such data, especially scatterplots of highly correlated
variables and plots of values measured before and
after using tilted line segments. Valuable alternatives are
available using horizontal reference patterns, changes plotted as parallel
lines, and parallel coordinates plots. The quantities of interest (usually
differences on some scale) should be shown as directly as possible, and the
responses of given individuals should be identified as easily as possible.",
pages = "329-349(21)",
url = "http://www.stata-journal.com/article.html?article=gr0005"
}