Who do you trust? How data is helping us decide

Faced with a choice of babysitters, which do you rely on: your instinct – or the algorithm that tells you to book the one in the green top?My first lesson in the dangers of trusting strangers came in 1983, not long after I turned five, when an unfamiliar woman entered our house. Doris, from Glasgow, was in her late 20s and starting as our nanny. My mum had found her through a posh magazine called The Lady.Doris arrived wearing a Salvation Army uniform, complete with bonnet. “I rememb