Representative res estimate for no-PDF (yellow) study; author preference unknowable. Value -0.1123 confirmed against Dahl DEDD ref Mat79 (El-r SR -0.1123); Dahl cross-check CONFIRMED.
Matsui, K. (1979): “Income and Price Elasticities of Energy Demand in Japan.” In: Energy in Japan. Quarterly Report 46/1979, Japanese Institute of Economic Research,  9-24