Governments of poor countries generally practise 'urban biased' polici
es that penalise the agricultural sector to the advantage of non-agric
ulture. Conversely, governments of rich countries generally practise '
rural bias'. As South Korea and Taiwan have become relatively wealthy
over recent decades, they have also shifted from urban biased to rural
biased policies. Adherents of the rational choice approach to politic
al analysis claim to provide an explanation of the causes of this patt
ern. This explanation is based on changing patterns of political inter
ests and coalition-forming possibilities induced by the changes in eco
nomic structure characteristically associated with economic growth. An
evaluation of this claim in the light of the South Korean and Taiwane
se cases suggests that: (a) it has considerable validity, although its
explanatory power is easily exaggerated; (b) a satisfactory rational
choice approach would encompass a wider range of political actors than
has been incorporated in existing analyses; and (c) that some importa
nt causes of the shift from urban to rural bias in South Korea and Tai
wan lie in factors that are not illuminated by the rational choice par
adigm - notably emulatory action between states.