Explain Share of Voice and Quantitative Method of Advertising Budget?

The quantitative method:-

Modern advertising manufacturers use quantitative methods such as regression analysis. Regression analysis is based upon cross-sectional data & time series data.

Share of voice method:-

The underlying principle in this method is that the dominant brand in the product category will spend lower than its market share. The other brands will spend either equal to or greater than their market share depending on the marketing task of the brand.