1) The document discusses various residential real estate statistical models like Case-Shiller, OFHEO, and Zillow that use different data and algorithms to track housing prices.
2) It provides an overview of how the housing vacancy and credit crisis (HVCC) has negatively impacted the housing market by increasing processing times, appraisal fees, and costs to consumers.
3) The absorption rate is introduced as a metric to measure inventory levels and determine if a market is in sellers or buyers territory, with a balanced market around 6 months of inventory.
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