Table 4 Specification (4) with all controls is the benchmark the narrative revolves around (its -0.35 price / 0.14 income are the abstract's range endpoints), and the authors state estimates without the lifestyle controls of spec (4) are biased; Table 8 rows are heterogeneity checks only. || "However, the estimated income elasticity becomes biased without controlling those lifestyle-related variables." (p. 398, printed; spec (4) elasticities -0.353/0.141 headlined in abstract as "price and income elasticities ranging from -0.35 to -0.50 and from 0.14 to 0.33", p. 394)
Zhou, S., & Teng, F. (2013): 'Estimation of urban residential electricity demand in China using household survey data.' Energy Policy, 61, 394-402.