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.

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Sentiment is determined by a number of methods, such as option pricing, analysis of the tick trading data, surveys of investors, musings in the social media and comments by the analysts.

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If road pricing is to be made politically acceptable, both the methods of charging and the use of the revenues must be easily understood and made totally transparent.

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