由於區段地價為土地稅及內政部都市地價指數的主要參考資料，因此，政府依據地價調查所得的地價資料，關係著政府課徵土地稅的公平性及都市地價指數的準確性，故其正確性及合理性與否是相當重要的。本文實證結果發現，在控制相同自變數的地價模型，聯合貢獻說分離地價資料所建立地價模型於各項比較結果均較佳，可知以聯合貢獻說分離房地價格較為合理，此外，土地貢獻說分離地價平均高於聯合貢獻說分離地價 13.13%，若以土地貢獻分的離方式建立地價指數，其地價指數波動較大。本文與內政部地價指數比較，發現地價調查估計規則的房地分離方

Real estate valuation theory indicates three principles of contributions: land contribution, building contribution, and joint contribution. Many researchers advocate the principle of land contribution because land is sustainable and without depreciation. According to valuation and economic theory, the principle of joint contribution conforms to the theoretic implication comparatively; therefore, it is worth exploring the debates between the principle of land contribution and the principle of joint contribution. Compared to the land price index of Ministry of the Interior, this paper tries to find a more reasonable allocation ratio and establish a land price index. Empirical evidences seem to indicate that the land price model based on the principle of joint contribution is better than is the model based on other principles. On the contrary, the trend of the land price index of the Ministry of the Interior is different from the housing price index because land quality is not controlled.