This essay investigates the theoretical foundations of the urban bias
thesis and discusses new evidence on intersectoral resource flows. It
is argued that the existence of dynamic economies makes a critical dif
ference in the patterns of intersectoral resource flows at different s
tages of development. An appraisal of the five volume study by the Wor
ld Bank of the 'political economy of agricultural pricing policy' is m
ade in this context. This is followed by our own case studies where it
is found that the nature of dynamic economies in the non-agricultural
sectors, and the efficiency of resource use within agriculture, by an
d large neglected in the conventional urban bias literature, are the k
ey elements in understanding the historical patterns of intersectoral
resource flows.