The founder of IKEA has died (he was known as the world's thriftiest billionaire) IKEA founder Ingvar Kamprad, who was worth $40 billion by some estimates, has died aged 91. Kamprad died on Saturday at his home in Smaland, in southern Sweden, the chain's Swedish unit, IKEA Sverige, said on Twitter on Sunday. He died peacefully following a short illness, it said. "He will be much missed and warmly remembered by his family and IKEA staff all around the world," the company said. "Ingvar Kamprad was a great entrepreneur of the typical southern Swedish kind, hardworking and stubborn, with a lot of warmth and a playful twinkle in his eye," IKEA said in a press release. The Swedish entrepreneur was notorious for having been almost comically thrifty. He was known to be frugal in all he did, including buying his clothes at flea markets. There are also reports that he always waited until he was traveling in third world countries to get a haircut, so it would be cheape...