is the error term for firm i in year t from 2006 to 2009. i : is firm is fixed effects. We regard the observations for firms where the guarantee dummy is equal to one as the treatment group.
is the error term for firm i in year t from 2006 to 2009. i : is firm is fixed effects. We regard the observations for firms where the guarantee dummy is equal to one as the treatment group.a dummy variable that takes a value of one