Across most global cities, higher household income tends to correlate directly with higher rates of car ownership, solo car commuting, and vehicle miles travelled. So, one could argue, as many do, that cycling is what economists call an inferior good, meaning that as incomes increase, demand for cycling decreases.
But this isn’t perfectly true. Data from the US — an obviously car-dominated place — has shown that bicycle demand is actually U-shaped. A 2013 community survey showed that the poorest quartile of Americans accounted for 39% of bicycle commuting, whereas the wealthiest quartile accounted for 20%. It was the people in the middle who biked the least.
In the case of the poorest quartile, it is out of necessity; for the wealthiest quartile, it is a choice, often for health, environmental, and overall efficiency reasons. Cycling saves time and money.
It could also be the case that the wealthy are able to live closer to work in more walkable communities, and so biking becomes a more tenable option. Irrespective of the reason, it casts doubt on the argument that cycling is truly an inferior good.
I actually think that the more fundamental cause is our built environment. If you design a place for cars, then of course, as people make more money, they’re going to choose the more convenient option and drive more. It’s what you’ve been optimizing for.
On the other hand, if you design for transit or cycling, then you start to break this relationship with income.
Consider that in some of the wealthiest arrondissements in Paris, private vehicle commuting is less than 10%; that in Manhattan, the majority of households do not own a car despite having incomes that far exceed the US national average; and that in Copenhagen, high-income earners in the city centre cycle at the exact same rate as low-income earners.
Wealthy people will always optimize for convenience. In a car-centric city, that means driving. But this doesn’t mean that cycling is an inferior good; it just means we’re building inferior cities.










