Industrial: authors explicitly adopt the FE column-1 estimate -0.6907 (endogeneity test p>0.05 so no IV needed); Residential: authors explicitly substitute the 2SLS estimate -0.4641 (endogeneity test p=0.0321<0.05) || 'we use the results of -0.6907 in column 1 to calculate the following equations' (p.7) and 'the elasticity of residential electricity demand is substituted with the result of the two-stage least square method -0.4641' (p.8)
Yang, Z., & Liang, J. (2023): "The environmental and economic impacts of phasing out cross-subsidy in electricity prices: Evidence from China." Energy, 129154.