After dropping the insignificant intra-marginal price (collinearity 0.9962), the re-estimated model on p. 293 is the final model; its SR (-0.1327) and LR (-0.1327) elasticities are tabulated on p. 295 and restated as the paper's finding in the conclusion, so both twins are preferred. || "The results indicate that electricity is not very responsive to the price changes which have occurred over the period, while it has been fairly responsive to changes in real per capita income." (p. 295, printed; Conclusion)
Durant, I. (1990): 'The residential demand for electricity in Barbados: 1966-1988.' Central Bank of Barbados.