Where the words come from
Tax incidence, the wedge between the price consumers pay and the price producers receive, tax revenue as the tax per unit times quantity, the burden falling on the more inelastic side, the cigarette elasticity of 0.3, the beachfront hotel case, and revenue falling as the curves become more elastic — Principles of Economics 2e, OpenStax, licensed CC BY 4.0. https://openstax.org/books/principles-economics-2e/pages/5-3-elasticity-and-pricing. Changes: Pc, Pp and Pe relabelled P2, P3 and P1, and Qt relabelled Q2; 2e draws the tax as a wedge and says it "could also be represented by a leftward shift of the supply curve", and we draw the shift up by the tax as UK specifications do; "beachfront hotels" to "seaside hotels"; the restaurant meal elasticity kept only as elastic; the crisps and cinema examples and the 70p split invented; British spelling.
Businesses treating taxes as costs, so a tax shifts supply — Principles of Economics 2e, OpenStax, licensed CC BY 4.0. https://openstax.org/books/principles-economics-2e/pages/3-2-shifts-in-demand-and-supply-for-goods-and-services. Changes: The US alcohol tax example dropped.
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