根据布鲁金斯学会发布的《非洲前瞻：2018年的重点优先事项》报告 — — 该报告概述了《无烟工业》一书中的各项结论 — — 在1998到2015年间，非洲的服务出口增速比商品出口增速快了六倍以上。
According to Foresight Africa: Top Priorities for 2018, a Brookings Institution report previewing the results of Industries Without Smokestacks, services exports from Africa grew more than six times faster than merchandise exports between 1998 and 2015.