Amazon: the obscure subsidiary at the heart of US and EU tax disputes

Arcane unit in Luxemburg that allows US multinational to pay much lower taxes is at the centre of demands for firm to pay more

If you had to sum up Amazon's core business in a single sentence, how would you put it? Is it a website where you can order almost anything? Or is it a quick and convenient delivery network allowing you to receive the goods you need promptly?

Clearly, it is both. But precisely how the group's economic value is split between the two is now a vexed question at the heart of tax disputes on both sides of the Atlantic.