Real estate valuations: machine learning approach

I show a machine learning approach to home price index (HPI). The algorithm estimates home price for every quarter based on comps, starting from Jan 2000, and rolls out prices on the neighborhood level then it incorporates a smoothing algorithm to exhibit price trend, one for each of the 200,000-odd neighborhoods in the USA.  Home price index based machine learning was published by HomeUnion beginning in 2016.