Recursive evolving: Homoskedasticity		Recursive evolving: Heteroskedasticity
roilp_p → sent_p	All periods	roilp_p → sent_p	All periods
sent_p → roilp_p	1993m10-1993m12; 1994m3; 1995m4-2018m12	sent_p → roilp_p	1995m1-2018m12
roilp_p → sent_n	All periods	roilp_p → sent_n	All periods
sent_n → roilp_p	All periods	sent_n →roilp_p	All periods
sent_p → roilp_n	All periods	sent_p → roilp_n	1987m5-2010m11; 2011m1-2018m12
roilp_n → sent_p	1987m5-2010m10; 2011m1-2012m1; 2012m5-2018m12	roilp_n → sent_p	1987m5-1998m9; 1999m5-1999m9; 1999m11-2018m12
roilp_n → sent_n	1987m5-1993m7;1993m10-1994m2; 1997m1-1997m5; 1997m7-2018m12	roilp_n → sent_n	All periods
sent_n → roilp_n	All periods	sent_n → roilp_n	All periods