. . "Predatory pricing" . . "differential and preferential railway rates" . . "price dumping" . . "loss-making" . . . "aggressively undercutting" . "Criticism of the theory of predatory pricing" . "Predatory pricing" . "aggressively undercuts" . . . . "price-cutting strategy" . . . . . . . "predatory rate cut" . "predatory prices" . "predatory pricing" . . "under-cutting" .