The latter may in some cases be politically more difficult to achieve, however, the fundamental problem of identifying, measuring and internalising external costs applies equally in both regulated and deregulated markets. The monetisation of social costs outside a market framework can be misunderstood as a fanatical attempt to reduce all aspects of human well-being to a question of dollars and cents. The large uncertainties involved, which can produce results that change considerably over time or between comparable projects, are also an easy target for detractors.