“…Since these are relatively new products, and are only offered in a few countries, there is a less established literature pertaining to consumption patterns for these products. However, there is a number of studies of consumers' 'willingness to pay' for green electricity in the United States (Farhar & Houston, 1996;Roe et al, 2001;Zarnikau, 2003), Canada (Rowlands, Scott & Parker, 2003) and the United Kingdom (PRASEG, 1996;Colbourne et al,1999;Batley et al, 2001). There is also a literature on green power marketing which is concerned with how best to promote greener electricity products to customers (Wiser, 1998).…”