Bos, Iwan; Marini, Marco A. - 2020
We appreciate the comments of and discussions with David Collie, Luis Corchón, Jean Gabszewicz, Andrey Minaev, Riccardo Saulle, Attila Tasnádi, Jacques-François Thisse and participants at the Oligo Workshop in Nottingham. All opinions and errors are ours alone.