Accounting for Option–based Compensation: The Economic Cost Approach
提出经济成本法，在期权有效期内调整价值变动，并在行权日按公允价值记录股票发行，以改进传统内在价值法和公允价值法。
The intrinsic value approach amortizes over the life of the option, the difference between the stock price on the date of the grant and the exercise price of the option. The fair market value approach amortizes over the life of the option, the market value of stock options on the date of the grant. These approaches do not reflect the changes in the option–based compensation cost after the grant date. This paper proposes an economic cost approach that not only adjusts for the changes in the value of the options during its life but also records the issuance of the stock at fair market value on the exercise date.