In both cases (with the exception of decoupled payments), the result is that instability is exported to world markets. This tendency of agricultural policies to stabilise domestic markets acts as a vicious circle: as world markets become more volatile, governments see even more reason to stabilise domestic markets, thereby adding further to instability in international trade. Of concern here is the extent to which the drivers are, themselves, likely to exhibit greater variability and uncertainty in the future, or to condition market responses in ways that will exacerbate price volatility in the coming decade. The main drivers are discussed individually below.