One of the sources mentioned in the WSJ article is governmental, the Office of Federal Housing Enterprise Oversight, and the other is private, the Case-Shilling Index from S&P. The OFHEO data presents a more optimistic picture than does Case-Shilling. If you want a good comparison of the two sources, the OFHEO published a research note last year, complete with charts and graphs. I certainly wish I’d had the space to include those two sources. Maybe I’ll write myself a letter to the editor.