“…"purely endogenous technical progress" (Pemberton and Ulph, 2001). Strong arguments have been made to "augment" the World Bank's GS estimates by including exogenous technical progress (Weitzman 1997, Pemberton andUlph, 2001;Pezzey, 2004;Pezzey et al, 2006;Mota et al, 2010;Greasley et al, 2014;Hanley et al, 2015;Blum et al, 2017, Mota andCunha-e-Sá, 2019). In general, GS studies have included exogenous technical progress by estimating the "Solow residual" or total factor productivity (TFP) from a standard growth accounting exercise.…”