OLS · Foundations
Linear Regression as a Model
OLS describes the conditional mean of a continuous outcome using one or more predictors.
Page 1 of 7 · Big Picture
The big picture: Linear Regression as a Model
What does OLS estimate?
Why a policy analyst should care
OLS is more than a fitted line: it estimates a conditional mean relationship whose coefficient meaning depends on units, specification, and the population represented.
Follow the idea from the opening question to a practical decision. These are the conceptual moves this module will develop:
1 Question What does OLS estimate?
2 Explore Move from a line to deviations
3 Formalize Observed outcome, fitted value, residual
4 Transfer Specify an OLS analysis
Use the left and right arrow keys to move between pages.