Calculating Equity: Ordinal and Ratio Criteria.

meets these criteria when OilIi > 0. When OilTI < 0 the outcomes specified by this formula correspond to the outcomes specified by a ratio formula when corrections for scale are applied to I, in the ratio formula such that sign Ii = sign 0i. This convergence of ratio and linear approaches to defining equity is seen as a clear advance in the formal understanding of equity, and it is recommended that this modified version of the Harris formula be adopted as a working theoretic definition of equity.