物權法經濟分析之方法論包括經濟分析和法教義學兩個面向，在中文世界罕有研究。張永健教授獨著之《物權法之經濟分析—所有權》，以及與王鵬翔教授合著之〈論經濟分析在法學方法之運用〉，填補研究空白，意義深遠。本文旨在反思其潛在不足，以裨方法論之發展。 在經濟分析面向，信息成本、生產效率、配置效率等概念未必堪當大任，在物權法領域支撐一套有別於一般法律經濟分析之專門方法論。從具體應用來看，相較於教義分析，物權法之經濟分析的優勢在於其一貫的事前視角和成本效益視角；但經濟分析的品質並不必然優於教義分析。 在法教義學面向，經濟分析融入法教義學的主要通道為目的解釋方法。區分一階與二階效率，並試圖在二階效率層面論證，經濟分析在目的解釋和法律解釋後設方法兩種情境能有效化解一階價值之衝突，目前尚難謂成功。

There are two dimensions to the methodology for economic analysis of property law, one economic and the other doctrinal. Both of them were rarely explored in Chinese literature until two groundbreaking studies published recently: the book Economic Analysis of Property Law by Professor Yun-Chien Chang and the article On the Use of Economic Analysis in Legal Methodology co-authored by him and Professor Peng-Hsiang Wang. This article aims to reveal the potential weaknesses of these two studies and helps to improve the aforementioned Methodology. As regards the economic dimension, it is indeed hard to deviate from the general methodology for economic analysis of law and establish a new one specifically for economic analysis of property law, based upon concepts including information cost, productive efficiency, and allocative efficiency. Concerning its consistent ex ante perspective and cost-benefit approach, economic analysis has an advantage over doctrinal analysis in confronting many property-law issues. But the advantage does not necessarily lead to better analysis output. With respect to the doctrinal dimension of the methodology, teleological interpretation is the main entry for integrating economic analysis into the doctrinal study of law. The classification between first-order efficiency and second-order efficiency in the relevant study is not persuasive. Neither is the argument that economic analysis can, in the sense of second-order efficiency, substantially resolve first-order-value conflicts in the context of teleological interpretation and meta-methodology of statutory interpretation.

經濟分析；法經濟學；信息成本；交易成本；配置效率；生產效率；一階效率；二階效率；法教義學/法釋義學；法律解釋

economic analysis; law and economics; information cost; transaction cost; allocative efficiency; productive efficiency; first-order efficiency; second-order efficiency; the doctrinal study of law; statutory interpretation