It is that as a mathematician he discovered - alone and unaided - the binomial theory usually attributed to a famous English scholar called Isaac Newton.

BBC: Part Three - France and the World

There is reasonable concern that current methods of option pricing, both the Black-Scholes and binomial models, are not appropriate for determining the cost of the nontransferable, long-term options that companies issue to employees.

FORBES: AIG Chokes On Options Remedy