carry out the 1+inf step in computing the lower bound of the DoTT; everything is still conditional on ytmin1
u.ytmin1(ytmin1, delt, y.seq, ytmin1.seq, Y1t, Y0tmin1, Y0tmin2, Y0tqteobj,
F.y1, F.y0)
the value of ytmin1 to condition on
the value to obtain the DoTT for
possible values of y
vector of outcomes for the treated group in period t
vector of outcomes for the treated group in period t-1
vector of outcomes for the treated group in period t-2
for any value of ytmin1, returns a scaler F^U(delt|ytmin1)