The date of birth may affect one’s chance to climb up to the topmost corporate position in future career, a Canadian study shows. The study, carried out by researchers from Sauder School of Business at University of British Columbia, is based on a sample of 375 CEOs from S&P 500, between 1992 and 2009. Set to appear in the December issue of the journal Economics Letters, the study found that only 6.13 percent and 5.87 percent of the CEOs were born in June and July, respectively. By comparison, people born in March and April represented 12.53 percent and 10.67 percent of the sample, it said.