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Assessment of Predictor Importance with the Example of the Real Estate Market

机译:以房地产市场为例评估预测变量的重要性

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Regression methods can be used for the valuation of real estate in the comparative approach. However, one of the problems of predictive modelling is the presence of redundant or irrelevant variables in data. Such variables can decrease the stability of models, and they can even reduce prediction accuracy. The choice of real estate’s features is largely determined by an appraiser, who is guided by his/her experience. Still, the use of statistical methods of a feature selection can lead to a more accurate valuation model. In the paper we apply regularized linear regression which belongs to embedded methods of a feature selection. For the considered data set of real estate land designated for single-family housing we obtained a model, which led to a more accurate valuation than some other popular linear models applied with or without a feature selection. To assess the model’s quality we used the leave-one-out cross-validation.
机译:比较方法可以将回归方法用于房地产评估。但是,预测建模的问题之一是数据中存在冗余或不相关的变量。这样的变量会降低模型的稳定性,甚至会降低预测精度。房地产功能的选择主要取决于评估师,评估师应以其经验为指导。尽管如此,使用特征选择的统计方法仍可以导致更准确的评估模型。在本文中,我们应用属于特征选择嵌入方法的正则化线性回归。对于指定用于单户住房的房地产用地的数据集,我们获得了一个模型,该模型比使用其他一些使用或不使用特征选择的流行线性模型得出的估值更准确。为了评估模型的质量,我们使用了留一法交叉验证。

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