No single year is designated the headline; the paper presents Allen own-elasticities for four evaluation years (1963,1968,1974,1979) equally and emphasizes the methodology. The coded 1974 mid-sample electricity own-elasticity is retained as the representative preferred value. || 'Using the formulas introduced in section 2, Allen and Morishima elasticities corresponding to the selected model (f) have been placed in table 4.' (p.154)
Mountain, D. C. (1989): “A Quadratic Quasi Cobb-Douglas Extension of the Multi-Input CES Formulation.” European Economic Review 33(1), 143-58