In an ideologically loaded article, the Economist looks at the near-universal institution of bribery, with some interesting cross-cultural comparisons. About halfway into the article, while discussing journalists being at the receiving end of bribes, you get this touching bit of candour:
The Economist lays down clear rules for its journalists. An envelope stuffed with cash, much less a $240,000 contract, would be inappropriate. Any gift, says the policy, must be consumable in a single day. So a bottle of wine is acceptable, a case of wine is not.