整合水量與水質之自來水訂價模式的經濟分析

The Economic Analysis of Integrated Water Quality and Quantity for the Pricing Model

李堅明(Chien-Ming Lee) ； 周莉里(Li-Li Chou)

《都市與計劃》 32卷4期 (2005/12) Pp. 355-369

https://doi.org/10.6128/CP.32.4.355

摘要

本文建構一個整合水質與水量的自來水最適訂價模式，分析影響水價調整因素，包括用水彈性、水質、報酬率及水源保育等，研究結果如下：(1)報酬率管制下，自來水廠資本存量高於利潤最大行為的最適資本存量，隱含報酬率管制下的自來水廠存在過度投資問題，易出現虧損的現象；(2)如果報酬率管制之最適資本存量未過度偏離未管制之最適資本，則報酬率管制下之訂價將偏低，隱含提高水價策略將可達到改善自來水廠虧損之目的；(3)水價調整之參考因素相當多，主要受到水量與水質效果影響，自來水廠應確保水量供應穩定及水質改善，可大幅提高調漲水價政策的可行性；此外，若能夠將增加之水費再用於水源保護以及淨水資本投資上，以確保水資源品質，將是自來水廠永續經營的重要策略。

關鍵字

水質 ； 水量 ； 水價

並列摘要

This study creates a model integrating water quality and quantity of tap water pricing mode. This study attempts to determine how the key factors (including price elasticity, regulation return rate, consumers water quality preference, and water conservation) affect the tap water pricing system. Analytical results are as follows: (1) under the regulation return rate, the price is lower than the optimal case and results in deficit; (2) under the regulation return rate, if the capital stock is sufficiently close to the optimal case, then increasing tap water price can enhance firm performance; and, (3) to continue improving water quality is the best strategy for a firm achieves sustainable development.

並列關鍵字

Water quality ； Water quantity ； Water pricing

參考文獻

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