Estimation of Demand Systems Generated by the Gorman Polar Form; A Generalization of the S-Branch Utility Tree
Charles Blackorby, Richard Boyce, R. Robert Russell, Estimation of Demand Systems Generated by the Gorman Polar Form; A Generalization of the S-Branch Utility Tree, Econometrica, Vol. 46, No. 2 (Mar., 1978), pp. 345-363