“…These studies suggest that technological advances may have also generated IRS for banks. Indeed, using a variety of methodologies and datasets, several recent studies find more evidence of substantial economies of scale in banking, with some finding that even very large banks operate under IRS (e.g., Hughes & Mester, ; Kovner, Vickrey, & Zhou ; and Wheelock & Wilson, , for US banks; and Becalli, Anolli, & Borello, , for European banks). However, other studies are less conclusive (e.g., Feng & Zhang, ; Restrepo‐Tobón & Kumbhakar, ) and questions remain.…”