The delimitation of functional spatial units or functional territories is an important topic in regional science and economic geography, since the empirical verification of many causal relationships is affected by the size and shape of these areas. This paper, written by Julio A. Berdegué, Tatiana Hiller, Juan Mauricio Ramírez, Santiago Satizábal, Isidro Soloaga, Juan Soto, Miguel Uribe & Olga Vargas , proposes a two-step