While all major home price indexes aim to track housing valuations, they differ significantly in their construction approaches. Key differences include: median sales price vs. repeat sales models; breadth of property types and transactions covered; algorithm complexity ranging from simple medians to complex hedonic regression; ability to control for property attributes like size, age, renovations; treatment of new construction; level of segmentation and stratification; transparency of methodology; frequency and policy of historical revisions; and other factors.
