Economic evaluation of biological invasions-a survey

As general findings we note: (1) current studies mostly have methodological shortcomings compared to their theoretical basis; (2) they concentrate on ex-post assessment and neglect ex-ante considerations; (3) prevention, the strategy favoured by the CBD, has been hardly reflected; and (3) the high degree of uncertainty associated with biological invasions is insufficiently addressed. With regard to these findings we state that the results of current studies should be carefully used. For the development of a national strategy they are less suitable.