The Construction of Residential Housing Price Indices: A Comparison of Repeat-Sales,Hedonic-Regression,and Hybrid Approaches

This article examines a number of hypotheses that underpin the repeat-sales and hedonic approaches to the construction of housing price indices, as well as the practical problems associated with the implementation of either approach. We also examine a hybrid procedure that combines elements of both the repeat-sales and hedonic-regression techniques. For our sample of individual home sales in Oakland and Fremont California over an 18-year period, repeat-sales methods are subject to sample selection bias; the maintained assumption of time constancy of implicit prices of housing attributes is violated; the repeat-sales estimator is extremely sensitive to influential observations; and the usual method used to correct for heteroskedasticity in repeat-sale housing returns is inappropriate in our sample. Hedonic techniques are better suited to contend with index number problems per se, as they can accommodate changing attribute prices over time. They also appear to give rise to more reliable estimates of price indices, as unusual observations have less effect on estimated price indices. Drawbacks of the hedonic approach include the usual concern with omitted attributes, and their effect on the estimated price index.     

基于VAR模型对CPI与房地产价格关系的实证分析

随着经济的不断发展,物价波动与房地产价格之间的关系逐渐成为关注的焦点。本文选取我国2006年1月至2010年12月的CPI和房屋销售价格指数月度数据,建立VAR模型。通过格兰杰因果检验发现:房地产价格和物价波动之间存在单向的因果关系。通过脉冲响应函数进行分析,表明房屋销售价格指数对CPI有着正向的作用。方差分解的结果说明在长期CPI的变动很大程度是由房屋销售价格指数引起的,房地产市场价格波动受自身因素的影响较大。