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Gasoline has a very inelastic demand. It became an essential product because it is used to produce energy, to use cars and for so many other functions. This article discusses if the elasticity of gasoline may is zero or not. Even the fact they are discussing it means that gasoline is essential because if its elasticity is considered to be zero or a little more it shows how important the product is and how muche the price of the product doesn't affect significantly the demand for it.

This article smoothly discusses the PED of gasoline. It's worth reading because it examines it clearly and quite precisely - e.g. taking into consideration time. It shows that gas is an inelastic good, due to the fact that it's really necessary and commonly used. This text ends with a nice conclusion stating that one's never fully sure about the changes in economy.

This is an article that appeared lately in The Economist. It considers gas taxation in order to fund roads. It gives the factor that we discussed during classes: substitutes to gasoline, PED, the influence on the environment.