Differences in style and capacity of government also give rise to divergent valuation (Cairncross, 1995: 35). As mentioned in earlier sections, where the benefits of environmental protection, and the expenditure to achieve it, accrue slowly and benefit those yet to be born and those in a different country, people often question the costs. Attempts to apply economic valuation to environmental problems in developing countries have been examined by Georgiou et al. (1997). The potential value of biodiversity from developing countries was mentioned in the last chapter. Swanson and Barbier (1992: 3) and Polasky (2002) provide some estimated market values in the mid 1980s for things like wild perennial maize, which is of huge value to crop breeders and could be worth billions of dollars.