“…Other studies incorporate similar diffusion structures but add other policy dimensions such as regulation, including manufacturer responses, Walther et al, (2010), add other indicators such as impact on fuel duty revenues (Shepherd et al, (2012) and the co-evolution of infrastructure for refuelling and extending to the cases of Natural gas, Jannsen et al, (2006) and Hydrogen Fuel Cell vehicles (Meyer et al, (2009) Kohler et al, (2010, Park et al,(2011)). Meanwhile others have investigated the role of strategic niche management, Kwon (2012), the implication of policies on distributional issues, Harrison and Shepherd, (2013) and applied similar diffusion models to the case of electric motorcycles in Taiwan, Trappey et al, (2012).…”