what is hedonic regression 
hedonic regression is the use of a regression model to estimate the influence that various factors have on the price of a good or sometimes the demand for a good in a hedonic regression model the dependent variable is the price or demand of the good and the independent variables are the attributes of the good believed to influence utility for the buyer or consumer of the good the resulting estimated coefficients on the independent variables can be interpreted as the weights that buyers place on the various qualities of the good understanding hedonic regressionhedonic regression is used in hedonic pricing models and is commonly applied in real estate retail and economics hedonic pricing is a revealed preference method used in economics and consumer science to determine the relative importance of the variables which affect the price of or demand for a good or service for example if the price of a house is determined by different characteristics like the number of bedrooms the number of bathrooms proximity to schools etc regression analysis can be used to determine the relative importance of each variable the hedonic pricing regression uses ordinary least squares or more advanced regression techniques to estimate the extent to which several factors affect the price of a product or a piece of real estate like a house the price is defined as the dependent variable and is regressed on a set of independent variables that are believed to influence the price based on economic theory the investigator s intuition or consumer research alternatively an inductive approach such as data mining can be used to screen and determine the variables to include in the model the selected characteristics called attributes of the good may be represented as continuous or dummy variables applications of hedonic regressionthe most common example of the hedonic pricing method is in the housing market wherein the price of a building or piece of land is determined by the characteristics of the property itself e g size appearance features like solar panels or state of the art faucet fixtures and condition as well as characteristics of its surrounding environment e g if the neighborhood has a high crime rate and or is accessible to schools and a downtown area the level of water and air pollution or the value of other homes close by the price of any given house can be predicted by plugging the attributes of that house into the estimated equation for hedonic regression hedonic regression is also used in consumer price index cpi calculations to control for the effect of changes in product quality the price of any good in the cpi basket can be modeled as a function of a set of attributes and when one or more of these attributes changes the estimated impact on the price can be calculated the hedonic quality adjustment method removes any price differential attributed to a change in quality by adding or subtracting the estimated value of that change from the price of the item 1origin of hedonicsin 1974 sherwin rosen first presented a theory of hedonic pricing in his paper hedonic pricing and implicit markets product differentiation in pure competition affiliated with the university of rochester and harvard university in the publication rosen argues that an item s total price can be thought of as a sum of the price of each of its homogeneous attributes an item s price can also be regressed on these unique characteristics to determine the effect of each characteristic on its price 2