由於房地產一直被視為經濟體中的火車頭工業，如果房地產市場看好，使得建商增加房屋供給，對建材、工人的需求提升，將有助於帶動國內的景氣，因此政府有必要介入房地產市場，也許是採取直接的租稅政策，或是間接的由擴張性的政府政策刺激景氣進而帶動房屋市場熱絡。因此在完全預期的前提下，本文將Blanchard (1981)的模型加以引申，用這個一般均衡模型來探討政府政策的宣告效果，對經濟體系中產出及房價的最適調整路徑。

結果發現，如果政府為了刺激房屋市場復甦直接介入房屋市場，採取一個永久性的減免租稅政策；或是想透過刺激景氣以帶動房屋市場復甦，施行一個永久性的擴張性貨幣政策，那麼長期均衡的產出及房價都會上升，表示這兩個政府政策對於刺激房屋市場都是有效的。不論是突然執行的政策或是先宣告再執行的政策，短期房價在貨幣需求的所得彈性較大或利率彈性較小時會有過度調整；在貨幣需求的所得彈性較小或利率彈性較大時，短期房價是調整不足的，因此在政策真正執行之前，房價就已經有過度調整或調整不足的情況，而不會等到政策執行時才開始反應。至於暫時性的政策，房價會在宣告到執行前就已經上漲，產出則是從宣告到執行政策期間都是增加的。所以永久性的降低租稅政策及永久性的擴張性貨幣政策對刺激房價回升、帶動房屋市場熱絡都是有效的。

但是如果政府為了刺激景氣而採取一個擴張性的政府支出政策，對於房屋市場而言，長期均衡的房價會因為這個支出政策是用在對房價有負面或正面影響的建設上，而有不同的結果：長期均衡的產出會因為擴張性的政策而增加，但長期房價有可能下跌或上漲。所以執行擴張性的政府支出政策會使長期均衡的房價下跌或上升，要視當時的經濟狀況需要而定；但短期間房價都是屬於調整不足的。

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