S+ functions: Dr. Peiming Ma wrote S+ functions that I used to execute the analyses in this paper. The documentation is Dr. Ma's MS project paper. Here are ASCII files containing the functions for the gibbs sampler, trace plots, added-variable plot, collinearity check, case influence, residuals, and transformations. Although we have tested these functions to some extent, YOU USE THEM AT YOUR OWN RISK! We make no claims to efficiency or exemplary programming style, but they do appear to work. If anybody besides me has ever used them, they didn't tell me.