“…As for what concerns the value of i, Allen uses a value of i U K = 5% for England ( [2], Figure 8.1, p.188), but he never explicits the value of the French interest rate, i F R . To make the present result particularly robust, Figure 1 was drawn taking from the literature the estimate of i F R that was most favorable to Allen's argument and most unfavorable to ours: that is i F R = 15%, which is the highest estimate found in the literature ( [5], p.306-09; [7], p.302; [8], p.169-73). Notice also that, more generally, the essential message of Figure 1 is extremely robust to variations of ρ F R : holding other things constant, J would fall in Region I only if ρ F R ≥ 0.66.…”