WASHINGTON (AP) – President-elect Joe Biden has chosen former Federal Reserve Chair Janet Yellen to serve as treasury secretary, a pivotal role in which she would help shape and direct his economic policies. Her nomination was confirmed to The Associated Press by a person familiar with Biden’s plans who spoke on condition of anonymity to discuss them. Yellen, who is widely admired in the financial world, would be the first woman to lead the Treasury Department in a line stretching back to Alexander Hamilton in 1789. The 74-year-old Yellen was also the first woman to serve as Fed chair. She later became an adviser to Biden’s presidential campaign.