On June 28–30, we organise a conference to celebrate the 25 year anniversary of the Groningen Growth and Development Centre (GGDC) in Het Kasteel in Groningen. The conference will feature many prominent speakers: Dale Jorgenson (Harvard) will give an opening speech and keynote lectures by Eric Bartelsman (VU Amsterdam), Nick Crafts (Warwick), Robert Feenstra (UC at Davis), Beata Javorcik (Oxford) and Nathan Nunn (Harvard) will be among the highlights. If you want to submit a paper for inclusion in the program, see the call for papers.