Final answer:
Ordinary Least Squares (OLS) is a statistical method used to estimate the parameters of a linear regression model, often employed in financial analysis to predict stock returns based on dividend yields.
Step-by-step explanation:
The question is centered around the use of Ordinary Least Squares (OLS) estimation in the context of finance and stock market analysis. OLS is a method for estimating the unknown parameters in a linear regression model. The formula provided for stock returns 'r' based on dividend yields 'd' is an example of a linear relationship that can be analyzed using OLS.
In the model r₁₊₋₁ = α + βdₜ +e₁₊₋₋, the parameters α (alpha) and β (beta) are estimated using OLS and represent the intercept and slope of the regression line, respectively. The terms in parentheses and brackets below the estimated parameters represent standard errors and t-statistics, which are used to test the significance of the estimates. Based on the historical data, dividend yields are being used to predict the subsequent stock returns, taking into consideration the changes in dividend payout trends over time and their impact on stock performance.