He wants to explain the economy in jeans and the photo on his mobile phone doesn't deceive: informal, on a trip to Morocco ten years ago. He never wears a tie and he doesn't have LinkedIn. He studied economics because he listened to Fabià Estapé on TV3 and now he uses economics to explain day-to-day decisions. He is an associate professor at UPF and UVic-UCC, founder of the Kapital platform (which has 23,000 subscribers on Substack and 30,000 li…