This essay is about a money wage subsidy intended to reduce unemployment in regions with high unemployment and increase net exports. The genre of the essay is an idealised narrative of the historical development of the Regional Employment Premium, a money wage subsidy proposed by Nicholas Kaldor when he was fiscal adviser to the British Chancellor of the Exchequer and enacted by the labour Government in 1967. The article takes up the story of REP both as an innovative Keynesian instrument of intervention at the regional level and an illustration of the scientific coherence with which economic policies may be designed.