ABSTRACTThis study investigates the parametric drift of a Verdoorn‐type relationship across Japan's center‐periphery continuum, using prefecture‐level data for the 1965–75 time horizon. Our results indicate that in and around Japan's core neutral technological progress and capital deepening tend to he higher, whereas scale and external economies tend to be lower. This spatial variation is consistent with product cycle and regional dynamics theories. The study implements the expansion method techniques and research phi