The study - the 2003 M N RT study described in section 2.3 above - is best suited for the purpose of market and non-market valuation, particularly because the primary data upon which it was based was collected in 2002. Given that the cost-benefit analysis in section 3.10 was based on a 2001 social accounting matrix, the dataset used in section 3.10 and that used for the 2003 MNRT study should be fully comparable unless there is evidence of structural change between 2001 and 2002. To the best of the authors' knowledge, no such evidence exists.