“…of the predictions. The technique of bootstrapping applied on the residuals has been extensively used in the past (Shao, Tu 1955;Efron, Tibshirani 1986;Hall 1986Hall , 1988Beran 1988;Franklin, Wasserman 1992;Simar, Wilso n 1998;Glaz, Sison 1999;Bjørnstad, Falck 2001;Tribouley 2004;Chou 2006;Pesavento, Rossi 2006;Kapetanios 2008;Xiong, Li 2008;Charitos et al 2009;Jun Li et al 2009;Annaert et al 2009;Kascha, Mertens 2009;Barnes et al 2009). 4 th step: Based on the process mentioned above two new time series of the upper and lower limits of the B.C.I.…”