English, Article, Journal or magazine article edition: A repeat sales index Robust to small datasets Baroni, Michel; Barthélémy, Fabrice; Mokrane, Mahdi

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Bookmark: http://trove.nla.gov.au/version/23477
Physical Description
  • preprint
Language
  • English

Edition details

Title
  • A repeat sales index Robust to small datasets
Author
  • Baroni, Michel
  • Barthélémy, Fabrice
  • Mokrane, Mahdi
Physical Description
  • preprint
Notes
  • As suggested by D. Geltner, commercial properties indices have to be built using repeat sales instead of hedonic indices. The repeat sales method is a means of constructing real estate price indices based on a repeated observation of property transactions. These indices may be used as benchmarks for real estate portfolio managers. But the investors in general are also interested in introducing real estate performance in their portfolio to enhance the efficient frontier. Thus, expected return and volatility are the two key parameters. To create and to improve contracts on real estate indices, trend and volatility of these indices must be robust regarding to the periodicity of the index and the volume of transactions. This paper aims to test the robustness of the trend and volatility estimations for two indices: the classical Weighted Repeat Sales (Case &​ Shiller 1987) and a PCA factorial index (Baroni, Barthélémy and Mokrane 2007). The estimations are computed from a dataset of Paris commercial properties. The main findings are the trend and volatility estimates are biased for the WRS index and not for the PCA factorial index when the periodicity increases. Consequently, the level of the index at the end of the computing period is significantly different for various periodicities in the case of the WRS index. Globally, the PCA factorial seems to be more robust to the number of transactions. Firstly, we present the two methodologies and then the dataset. Finally we test the impact of the number of transactions per period on the trend and volatility estimates for each index and we give an interpretation of the results.
  • Index Estimations; Property Transactions Volume; Repeat Sales Indices
  • RePEc:ebg:essewp:dr-09003
Language
  • English
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