Pension fund considers suing Aon over costly clerical error

Pennsylvania's Public School Employees' Retirement System has hired an outside law firm to explore suing Aon PLC after it admitted botching a key profits calculation, the Finger Lakes Times reports. Aon has admitted that "inadvertent clerical mistakes" led the fund to adopt a false and exaggerated figure for profits, and after it revised the figures, 100,000 school employees had to pay more into the pension plan.