Giacomo Delledonne is Research Fellow in Comparative Public Law at the Scuola Superiore Sant'Anna, Pisa, Italy. He is co-convenor of the research group on Subnational Constitutions of the International Association of Constitutional Law. He has written extensively in four languages (Italian, English, French, and Spanish). His first monograph, L'omogeneità costituzionale negli ordinamenti composti (2017), was awarded with the 10th Opera Prima-Sergio P. Panunzio Prize, organized by the Italian Association of Constitutional Law Scholars. Giuseppe Martinico is Associate Professor of Comparative Public law at the Scuola Superiore Sant'Anna, Pisa, Italy. Previously he was García Pelayo Fellow at the Centro de Estudios Politicos y Constitucionales (CEPC), Madrid, and Max Weber Fellow at the European University Institute, Florence. He is also Honorary Professor at the University of Henan, China, and Research Fellow at the Centre for Studies on Federalism, Turin. Matteo Monti is a researcher in the Faculty of Law at the Scuola Superiore Sant'Anna, Pisa, Italy. Fabio Pacini is Research Fellow in Constitutional Law at the Scuola Superiore Sant'Anna, Pisa, and Adjunct Professor of Comparative Law at the Tuscia University, Italy. He coordinates a research group on parliamentary law at the Scuola Superiore Sant'Anna.