Authors headline the ARDL bounds-testing estimator, not OLS; the ARDL long-run price elasticity of 0.04 and short-run 0.02 are the reported figures in the price-elasticity section || 'The long-run price elasticity is 0.04, while the short-run value is 0.02.' (Section 6.4, p.3464)
Ziramba, E., (2008): “The Demand for Residential Electricity in South Africa.” Energy Policy 36(9), 3460-66