相關研究指出土地面積與地價應該呈現非線性關係，隨著坵塊面積增加，土地價格將先以遞增的速率增加，之後再以遞減的速率增加，即基地面積規模不經濟（plattage）和基地面積規模經濟（plottage）現象。本研究以台南市土地交易案例進行驗證，以總價模型利用「移動式Chow Test」尋找結構變化點，據以分析其經濟結構是否具有顯著差異。實證結果顯示基地面積規模經濟(plottage)與基地面積規模不經濟(plattage)現象同時存在。 / According to some literature, there is a nonlinear relationship between the land area and the land value. Land value will enhance with an increasing pace as land area increase in the beginning. However, as land area keeps increasing, the land value will only enhance with a decreasing pace. Namely, the plattage phenomenon will follow the plottage phenomenon. Bases on the land transaction samples from Tainan city and the model with total price as dependent variable, this research searches the structural change of the land area using Chow Test sequence to analyze whether there is significant distinction in economic structure. The empirical results show the plattage phenomenon coexists with the plottage phenomenon.