第六章 結論與建議
第二節 建議
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第二節 建議
在探討世代差異時，有兩種可能情況，一為單純因為出生世代不同而造成的 差異，另一即為年齡改變所造成的差異。前者為「代間」的不同，亦即以前 30 歲和以後 30 歲的差別；後者為「時間」的不同，指的是同一人從 30 歲到 40 歲 的差異。此次研究主要針對前者進行討論，本應將兩世代家庭的年齡設定為相 同，才能看出單純因為「世代」造成的差異。但礙於有效樣本的取得，已盡量將 年齡差距限縮，最終選取 RI1999 和 RI2003 兩年的資料，前者家戶年齡在受訪當 年是介於 35-46 歲，後者介於 27-39 歲，兩世代的年齡仍有所差距。因此，對於 單純地探討世代差異，仍有所偏誤。此外，若能夠取得更近年度的資料，則世代 差異的明顯程度勢必會更加明顯。期待往後研究能夠針對不足之處進行修正，俾 能對住宅市場的世代分析研究增添更多貢獻。
在資料取得上，我們只能得知房屋所有權為「自有」或「父母所有」，但「自 有」家庭當中，存在「自己購屋」或「父母贈與」兩種行為可能性，有多少比例 的家庭是「自己購屋」並無從得知。若能將「與父母同住」變數納入考量，透過 自有房屋中與父母同住的比例，或者父母所有房屋中與父母同住的比例，也許能 夠對代間移轉的現象有更進一步的探討，使研究更加完善。
針對 IIA 的問題，本研究僅單純假設不會發生，並沒有對解決方式多加著 墨，因此選用簡單多項式羅吉特模型進行實證分析。然而，多數學者指出，巢式 羅吉特模型是能夠解決 IIA 問題的方式之一。若以巢式羅吉特模型分析，先區分
「自有」與「租用」，而在「自有」之下，再區分「真正自有」與「父母所有」，
接著再區分「同住」與「不同住」，如此作法下，分析結果會有何不同、能否使 模型結果更加顯著，有待日後研究之。
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謝博明 (2006)，「台灣家庭所得與住宅消費之分配與變動：1980－2000」，住宅學 報，15(1)：59-78。
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84.91％ 85.40％ 87.89％
0
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附表 1 台灣地區戶數結構表 (民國 95-99 年)