Other speculation has focused on unscrupulous store employees raiding storerooms to make similar swaps.

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This observation explains the huge amounts of corporate cash reserves we now have that could be used for new products, but are stalled while electronic storerooms fill up with great ideas.

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At Nicolas Feuillatte, by contrast, visitors see the giant stainless steel vats in which the wine is blended, and the above-ground temperature-controlled storerooms, where specially commissioned works of modern art are displayed.

ECONOMIST: Champagne

The French Ministry of Culture wants to relocate this laboratory, as well as the Louvre's storerooms, to a site about 50km (30 miles) outside Paris in a new facility to be built in Cergy-Pontoise.

ECONOMIST: The da Vinci method