On this episode of Slate Money, hosts Felix Salmon of Fusion, Cathy O’Neil, author of the upcoming, Weapons of Math Destruction, and Josh Barro, Senior Editor at Business Insider, discuss hedge funds, declining US productivity, and technological innovations for vaginas.Topics discussed on today’s show include:Why are hedge fund returns stagnating?Why has US productivity declined for the last three quarters?New innovations in vagina technology. Check out other Panoply podcasts at itunes.com/panoply.Email: slatemoney@slate.comTwitter: @felixsalmon, @mathbabedotorg, @jbarroProduction by Zachary DinerstienSlate Money is brought to you by Casper, an online retailer of premium mattresses for a fraction of the price. Get $50 toward any mattress purchase by going to Casper.com/slatemoney and using the promo code slatemoney.And by Audible. Explore Audible’s unmatched selection of audiobooks, original audio shows, news, comedy, and more. Get a free audiobook with a 30 day trial at Audible.com/money.And by SeatGeek. Get the best deal on tickets to your favorite sporting or music events. Download the SeatGeek app and use promo code money for a $20 rebate on your first ticket purchase.Learn more about your ad choices. Visit megaphone.fm/adchoices