几大因素 — — 包括战后重建、20世纪30年代保护主义风潮过去之后的贸易复兴、电力、运输和跨国通信方面的新技术，以及教育程度的改善 — — 推动了长期繁荣。
Several factors, including post-war reconstruction, the resurgence of trade after the protectionist 1930’s, the introduction of new technologies in power, transport, and communications across countries, and expansion of educational attainment, underpinned the long boom.