Spatial Modeling of House Prices Using Normalized Distance-Weighted Sums of Stationary Processes
基于平稳过程归一化距离加权和的房价空间建模AI 解读 ↓
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基于平稳过程归一化距离加权和的房价空间建模AI 解读 ↓
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Hedonic models are used almost universally for modeling house prices. Recognizing the importance of location, the past decade has seen increasing effort to introduce spatial considerations into such modeling. When spatial process models are used to capture association between locations, isotropic specifications have been used almost exclusively despite the fact that they seem unlikely to be appropriate in practice. The contribution of this article is to offer a novel, flexible, and computationally tractable class of non-stationary models. We accomplish this using suitably normalized distance-weighted sums of stationary processes. The number of component processes used reflects the flexibility required to adequately explain the spatial residuals in the model. A flexible nugget (or pure error) process is also introduced and is needed to capture the nonspatial idiosyncrasies of house sale transactions. The models are fitted within a Bayesian framework requiring demanding computation but yielding full and exact inference through the posterior distributions of the model unknowns. A dataset of 656 single-family home sales in Stockton, California, provide an illustration.