DOLS panel long-run own-price (Model 1) is the headline own-price result; authors state DOLS is their preferred estimator || 'Kao and Chiang (2000) examined the finite-sample properties of OLS, fully modified OLS (FMOLS) and DOLS and found that DOLS was superior in all cases.' (p.4490); abstract: 'in the long-run residential demand for electricity is price elastic' (p.4485)
Narayan, K. P., R. Smyth, and A. Prasad (2007): “Electricity Consumption in G7 Countries: A Panel Cointegration Analysis of Residential Demand Elasticities.” Energy Policy 35(9), 4485–4494