“…Thus, if in every year tested the derived wrp curves are quasi-linear (e.g., Ochoa, 1989, Shaikh, 2016Tsoulfidis, 2021); there is no reason, whatsoever, to suppose there are other techniques in the economy characterized by wide curvatures that may give rise to reswitching and reverse capital deepening and have been ignored. Several studies not only ascertain the near-linearity character of the prp trajectories and the near-linearity wrp curves and the associated with these frontiers but additionally they offer explanations varying from the closeness of vertically integrated compositions of capital between sectors (Shaikh, 1984;Petrović, 1991;Torres-González, 2020;Torres-González and Yang, 2019) and the nearly randomly distributed input-output coefficients (Bródy, 1997;Schefold, 2013Schefold, , 2020.…”