A mass appraisal model is generally based on which type of analysis?

A mass appraisal model is generally based on multiple regression analysis due to its capability to evaluate the relationship between a dependent variable and several independent variables simultaneously. In the context of real estate valuation, the dependent variable might be the property value, while the independent variables could include various property characteristics such as size, location, and number of bedrooms.

Multiple regression allows appraisers to estimate the impact of each characteristic on property values effectively by analyzing historical data across a large number of properties. This is essential in mass appraisal, where the goal is to assess many properties efficiently and consistently. The multiple regression framework can account for the interactions and variations among the numerous factors that can influence property values, providing a robust statistical basis for the appraisals performed.

Other options like single-property analysis focus on individual property assessments rather than a comprehensive market-wide evaluation. Curvilinear regression is a specific form of regression that addresses non-linear relationships and is not typically the basis for mass appraisals, where linear relationships are often sufficient and standard. Automated valuation models, while relevant, typically use various statistical techniques, including multiple regression, to generate property value estimates but do not represent the foundational methodology on their own. Thus, multiple regression stands out as the primary analytical framework used in mass appraisal models.