题名

不動產自動估價與估價師個別估價之比較-以比較法之案例選取、權重調整與估值三階段差異分析

并列篇名

A Comparison of Automated Real Estate Valuation Models and Appraisers' Appraisals-Comparables Selection, Weighting Adjustment and Valuation for the Sales Comparison Approach

DOI

10.6375/JHS.200906.0039

作者

江穎慧(Ying-Hui Chiang)

关键词

不動產估價 ; 大量估價 ; 自動估價系統 ; 比較法 ; real estate appraisal ; mass appraisal ; automated valuation model ; sales comparison approach

期刊名称

住宅學報

卷期/出版年月

18卷1期(2009 / 06 / 01)

页次

39 - 62

内容语文

繁體中文

中文摘要

不動產估價研究可分為個別估價與大量估價兩類,過去有關個別估價研究多為估價行為或估價方法改進,而大量估價研究則多是運用數量方法建立模型,由於兩者建構方式不同,欲同時進行兩者實證比較並不容易。本文藉由相同勘估標的,取得估價師個別估價資料,與資料庫建立的自動估價系統,進行案例選取、權重調整及最後估值三階段的比較分析。經本文差異比較發現,自動估價系統選取比較案例差異小於個別估價,且自動估價系統符合比較案例相似度高時,給予其比較價格相對較高權重原則,從行為估價觀點,結果顯示自動估價系統具有較客觀且符合估價理論程序優點。然,受限於自動估價系統樣本資料分配限制,在資料樣本較少地區以及非典型住宅類型(面積過大或過小),比較結果為個別估價估值與自動估價系統估值差異大,顯示自動估價系統有其適用限制,未來若增加資料庫樣本或次市場模型,兩者估值差異將可獲得改善。

英文摘要

In real estate appraisal research, appraisers and mass appraisals are the two methods most often used in the sales comparison approach. In the past, most appraisers' studies focused on the appraisers' behavior or on improving appraising methods. Since these two methods are constructed in different ways, it is not easy to find enough objects for the analysis and a comparison between appraisers and mass appraisal. The main purpose of this paper is to select certain target cases and then compare the data provided by appraisers as well as the results of mass appraisals. The analysis is conducted in three stages: selecting comparables, adjusting weights and estimating values. The differences in the analysis indicate that the differences in the Automated Valuation Model (AVM) of the Minkowski metric of the comparables is smaller than the appraisals provided by individual appraisers. The findings indicate that the application of the AVM model is more objective and fits the appraisal procedure. However, with the limits of the AVM, the sparseness of the data and non-typical housing, the results of the AVM in some areas differ from those made by appraisers, which indicates that the AVM has limitations. This situation is expected to improve as a result of accumulating more data and adjusting the models. If the accuracy of the AVM is assured, the AVM will be applied more widely.

主题分类 社會科學 > 社會學
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被引用次数
  1. 曹妤,孫振義(2019)。綠建築評估項目對住宅不動產估價調整率之影響。住宅學報,28(1),26-50。
  2. 陳奉瑤(2011)。不動產估價師理性行為之探討。住宅學報,20(2),47-60。
  3. 劉富容,劉正夫,黃孝雲,游璿達(2019)。利用政府開放資料探討影響台北市房價之主要房屋特性及周邊設施影響因子。Journal of Data Analysis,14(5),1-26。
  4. 邢志航、李誠慶(2016)。企業商用不動產遷址標的租賃購買方案財務評估決策之研究。物業管理學報,7(1),39-55。
  5. 葉姿妤,江穎慧(2022)。社會住宅包租代管計畫租金檢核方式之研究。物業管理學報,13(2),27-38。
  6. 游適銘(2014)。部分調整行為之估價平滑─以地價基準地重估價為例。臺灣土地研究,17(1),1-21。
  7. 張金鶚,江穎慧,朱智揚(2019)。預售屋大量估價模型之建立。住宅學報,28(2),17-36。