“…A quantitative literature collates MPs' preferences in individual contests to uncover factional patterns (Booth et al, 2023;Cowley and Bailey, 2000;Cowley and Garry, 1998;Crines et al, 2018;Jeffery et al, 2018Jeffery et al, , 2022Jeffery et al, , 2023Heppell et al, , 2022Heppell and Crines, 2011;Heppell and Hill, 2008, 2009Roe-Crines et al, 2021). Leadership selection has also been linked to related political questions, such as cabinet reshuffles (Allen, 2023) and general-election forecasting (Murr, 2015(Murr, , 2021.…”