Final-state price coefficient sv1=-0.075 is the headline elasticity reported in Table 5 and echoed in abstract/conclusion (2005 value 0.045 also cited, but Table 5 final state = 0.075) || "sv1 (price coefficient) 0.075" (Table 5, p.3694); abstract: "it has decreased in absolute values from 1.077 in 1986 to 0.045 in 2005" (p.3693)
Inglesi-Lotz, R. (2011): "The Evolution of Price Elasticity of Electricity Demand in South Africa: A Kalman Filter Application." Energy Policy 39(6), 3690–3696