In a move that could further cement Zillow's status as an authority in real estate analysis, the search portal is partnering with research and consulting firm Pulsenomics LLC to publish survey-based consumer confidence indices the companies say will offer insights into attitudes that drive home prices and sales at the national and local market level. The Zillow Housing Confidence Indices, to be published twice a year beginning March 13, will be based on telephone interviews with more than 10,000 consumers nationwide.