In an off-week bonus episode of Money Talks, Felix Salmon, Emily Peck, and Elizabeth Spiers chat with Yale finance professor James Choi, who has cross-referenced the advice of more than 50 pop finance books with actual economic theory. How much should you save in your 20s and 30s? Should you put your money in a savings account or the stock market? Is it bad to change your retirement plan? James Choi spills the finance tea! If you enjoy this show, please consider signing up for Slate Plus. Slate Plus members get an ad-free experience across the network and an additional segment of our show every week. You’ll also be supporting the work we do here on Slate Money. Sign up now at slate.com/moneyplus to help support our work. Podcast production by Jared Downing and Cheyna Roth. Learn more about your ad choices. Visit megaphone.fm/adchoices