台北都會區不同住宅類型價差之研究

The Relationship Between Floor Area And Unit Price Across Different Residential Types in Taipei Metropolitan Area

從過去研究房價的文獻中發現，影響房價主要除了地理空間、面積、樓層外，住宅類型也是相當關鍵的一項因素，而過去文獻對此因素欠缺深入討論，因此本文從台北都會區常見住宅類型―透天、套房與電梯大廈的角度出發，探討住宅類型對於單價的影響，另外從個別住宅類型下探討面積與住宅單價的關係。本文在控制各項住宅特徵後，從住宅供需、典型住宅、非線性價格策略的角度觀察住宅類型影響單價的程度，另一方面，從不同住宅類型下檢測面積與單價關係為何？藉由台北都會區新推個案資料，實證研究結果發現：（1）在住宅品質控制下，套房每坪單價高於透天住宅6.76%，更高於電梯大廈10.72%，而透天住宅每坪單價高於電梯大廈3.7%。（2）在不同住宅類型中，透天與電梯大廈住宅其面積顯著影響房價，且呈現邊際價格遞增的數量溢價現象。 Past studies reveal the main factors that affect residential housing prices are location, floor area, and residential type. However, this is a lack of empirical evidence for the influence of floor area of different residential types on housing prices. Some researches had explored whether or not there exists a convex or a concave relationship between land lot size and its price due to economies of scale, typical houses, and nonlinear pricing behavior. This paper explores the relationship between floor area and unit price for different residential types, including single house, condominium, and studio, using regression analysis. Our empirical results show that housing price of a studio is 10.72 percent higher than that of a condominium and 6.76 percent higher than that of a single house for per ping (3.3m2) increase in floor area. The unit price of a single house is 3.7 percent higher than that of a condominium. The interpretation of this phenomenon may contribute to economies of scale and nonlinear pricing behavior.