“…Let that fraction be defi ned as the degree of parsimony , π where 0 ≤ π ≤ 1, as used in previous modeling of Smith's growth theory (Waterman 2009(Waterman , 2012(Waterman , 2013 ; see also Eltis 2000 , p. 94, equation 3.9). Let that fraction be defi ned as the degree of parsimony , π where 0 ≤ π ≤ 1, as used in previous modeling of Smith's growth theory (Waterman 2009(Waterman , 2012(Waterman , 2013 ; see also Eltis 2000 , p. 94, equation 3.9).…”