“…McDonald and Siegel, 1986;Dixit and Pindyck, 1994;Trigeorgis, 1996). Recently, the approach has been applied, among other things, to the adoption of soil conservation measures (Winter-Nelson and Amegbetto, 1998), marketing (Richards and Green, 2003), wilderness preservation (Conrad, 2000), agricultural labour migration (Richards and Patterson, 1998), the introduction of herbicide-tolerant sugar beets in the EU ) and the analysis of government reforms (Leitzel and Weisman, 1999). In the case of transgenic crops there are the additional irreversible government policy costs of the implementation of biosafety regulations and changes in patent laws.…”