“…Ay et al, 2012;Chicoine, 1981;Donoso and Vicente, 2001;Gardner and Barrows, 1985;Maddison, 2009;Miranowski and Hammes, 1984;Palmquist and Danielson, 1989;Troncoso et al, 2010). In order to determine the best functional form, the Box-Cox estimation is used in some studies (Ma and Swinton, 2012;Maddison, 2000;Miranowski and Hammes, 1984;Nivens et al, 2002;Palmquist and Danielson, 1989).…”