Anderson, Chris; Brisley, Neil - In: Applied Mathematical Finance 16 (2009) 4, pp. 347-352
A well-known numerical lattice model, widely used to value employee stock options (ESOs), can be interpreted as a variation on the up-and-out protected barrier call, a version of which is valued in closed form by Carr (1995). We clarify that valuation formula and extend it to take account of the...