def formula_2014_01_01(foyer_fiscal, period):
    """
        Cf. docstring période précédente
        """
    v1_assiette_csg_plus_values = foyer_fiscal('assiette_csg_plus_values',
        period)
    v2_rfr_plus_values_hors_rni = foyer_fiscal('rfr_plus_values_hors_rni',
        period)
    f3we = foyer_fiscal('f3we', period)
    f3vz = foyer_fiscal('f3vz', period)
    f3sb = foyer_fiscal('f3sb', period)
    f3wb = foyer_fiscal('f3wb', period)
    intersection_v1_v2 = f3we + f3vz
    ajouts_de_rev_cat_pv = f3sb + f3wb
    return (v1_assiette_csg_plus_values + v2_rfr_plus_values_hors_rni -
        intersection_v1_v2 + ajouts_de_rev_cat_pv)
