Patent Document ID: 8214275
Application ID: 12926289
Patent Flag: 1

Claim One:
1. A method for real property valuation, the method comprising: determining, by a computer, a base property price index after segregating transaction data into purchase transactions and non-purchase transactions; calibrating, by the computer, a median bias using the base property price index for the non-purchase transactions; adjusting, by the computer, the non-purchase transactions using the median bias; and determining, by the computer, a predicted value for a given property using a price estimation index, wherein the price estimation index results from applying a repeat sales model to the adjusted non-purchase transactions, wherein calibrating, by the computer, the median bias using the base property price index for the non-purchase transactions, comprises: calibrating, by the computer, the median bias using the base property price index for the non-purchase transactions for each questionable loan segment, for each relatively large geographical area, and for each time period, and wherein adjusting, by the computer, the non-purchase transactions using the median bias, comprises: adjusting, by the computer, the non-purchase transactions according to each group of a set of groups that the given property corresponds to, wherein each group of the set of groups comprises each questionable loan segment, each relatively large geographical area, and each time period.