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Who are Driving Electric Vehicles? An analysis of factors that affect EV adoption in Hawaii

Author

Listed:
  • Makena Coffman

    (Department of Urban and Regional Planning, University of Hawaii at Manoa; UHERO)

  • Scott Allen

    (Department of Urban and Regional Planning, University of Hawaii at Manoa)

  • Sherilyn Wee

    (UHERO)

Abstract

Electric vehicles (EVs) have the potential to reduce local air pollution as well as greenhouse gas emissions, assuming they are predominantly powered with renewable energy. Upon their reintroduction to the mass vehicle market in 2010, President Obama set a goal of having a million on the road in the U.S. by 2015. Similarly, in Hawaii, the Hawaii Clean Energy Initiative target was to have 10,000 EVs on the road by 2015 and 40,000 by 2020. Despite policy support, actual rates of EV adoption have fallen substantially short of stated goals. By the end of 2017, there were about 770,00 EVs within the U.S., with 6,700 of these in Hawaii. This study uses data on EV registrations by zipcode in Hawaii to analyze a variety of demographic and transportation factors that might affect EV adoption. We find that, after controlling for population and gasoline prices, higher income zipcodes are associated with higher levels of EV adoption – where an increase of $10,000 in median income is associated with an additional 6 EVs within the 2010-2016 study time period (where the average zipcode in our sample had 68 EVs in 2016). When educational attainment is measured, we find that a 1% increase in the number of people with at least a bachelor’s degree increases zipcode EV adoption by about 76. We find some evidence that gender can matter, similar to other studies that find that men are more likely to adopt EVs. The effect of age seems to be more robust, where we find that for every 1-year increase from the average zipcode’s median age, there are 1 to 2 more EVs. Most notably, we find that commute time affects EV adoption in Hawaii – which is somewhat surprising given the relatively limited travel distances of an island geography. We find that a 1% increase in the prevalence of commute times greater than forty-five minutes within a zipcode, likely meaning they are farther from the central business district, is associated with 37 fewer EVs relative to those with a commute time under forty-five minutes. This finding holds even when looking at the island of Oahu alone, which has the majority of the state’s population as well as the majority of EVs. The island is about forty-four miles long, far less distance than the range offered by most EVs. This suggests that there may be strong risk-aversion associated with EV range anxiety as well as prompts further study of the effect of trip-chaining on EV purchase decisions.

Suggested Citation

  • Makena Coffman & Scott Allen & Sherilyn Wee, 2018. "Who are Driving Electric Vehicles? An analysis of factors that affect EV adoption in Hawaii," Working Papers 2018-3, University of Hawaii Economic Research Organization, University of Hawaii at Manoa.
    • Handle: RePEc:hae:wpaper:2018-3
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    References listed on IDEAS

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    1. Kumar Sunil & Parihar, Shrutika & Garg, Amit, 2018. "Optimal allocation of electric vehicle charging infrastructure using GIS methodology," IIMA Working Papers WP 2018-12-01, Indian Institute of Management Ahmedabad, Research and Publication Department.

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