Eq. 6.21 is the reported electricity demand equation; the thesis reports these as 'the short and long term elasticities for RPELEC ... -0.04 ... and -0.20' (p.156). Both SR and LR are the study's headline own-price elasticities for electricity. || 'The short and long term elasticities for RPELEC and NELECC are -0.04 and 0.19, and -0.20 and 0.96 respectively.' (p.156)
Moghaddam, M. R. (2003): "Improving Iran's Domestic Energy Basket." Ph.D. Thesis, Department of Economics and Business Administration, Tilberg University, Tilberg, Netherlands