About one in eight people are left-handed.
Harvard professor Joshua Goodman crunched pay-data from the US and the UK and found left-handed people have 10 to 12% LOWER annual earnings than right-handed people.
Goodman notes, 'lefties work in more manually intensive occupations than do righties, further suggesting that their primary labor market disadvantage is cognitive rather than physical.'
Goodman piles on adding, 'lefties have more emotional and behavioral problems, have more learning disabilities such as dyslexia, complete less schooling, and work in occupations requiring less cognitive skill.'
Obama is left-handed. So is Bill Clinton. But then so is George H.W. Bush and Darrell Issa. Go figure...