Dear colleagues, The research group AQR-IREA present the 2023 Barcelona Workshop on Regional and Urban Economics, to be held in Barcelona on October 26th – 27th, 2023. We inform you that the programme is available at the workshop website.   On the other hand, we remind you that participants will be required to register using the online form that is available from 29th September to 24th October, 2023. For further information, please visit the workshop website www.ub.edu/aqr/workshop/2023 or contact to aqr_workshop@ub.edu. Please, feel free to distribute this announcement. Excuse us for “cross-posting”. We look forward for your participation at the Workshop! AQR-IREA Research Group