November 29th, 2007, 1:50 pm
You can value a liquid comparable security (which is the usual way the market approach to valuation is done) and then apply some sort of an illiquidity discount. Which comparable security/securities to use as well as how you measure the illiquidity discount is pretty subjective. Valuation books usually have a discussion of these things, as well as the academic literature. Empirical papers have also provided magnitudes of illiquidity discounts based on whatever sample and methodology they used.