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Article 1: Why do we tip waiters, hairdressers and taxi drivers bit not nurses and shop assistants? According to research in the US, more than 90% of restaurant diners tip their waiter or waitress about 10% of the bill. Tips are often a large part of the income of waiting staff. Research shows that, to get tips, some things work and others do not. There are three main factors which can increase tipping. | .

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