Global growth to 2024: reversion to which mean?

We expect global GDP growth to average 3.5% per year (at PPP exchange rates) over the next ten years. This is lower than the 3.8% recorded in 2000–14 though not dramatically so. There will be a modest recovery in advanced economy growth ‐ but not to pre‐crisis rates. Emerging market (EM) growth will slow but remain faster than growth in the advanced economies. And with EM's share in world GDP much increased from 10–15 years ago, EMs will continue to provide a large proportion of world growth. EM growth is expected to run at around 4.5% per year in 2015–24, well down on the 6% seen in 2000–14. This includes a slowdown from around 10% to 5–6% in China ‐ but China's share in world GDP has risen so much that China's contribution to world growth will remain very substantial. Advanced economies are forecast to grow by 1.9% per year in 2015–24, a big improvement from the 1% pace of 2007–14 (which was affected by the global financial crisis) but below the 1990–2014 average. Indeed, the gap between forecast G7 GDP and GDP extrapolated using pre‐crisis trends in potential output will remain large at 10–15% in 2015–24. Global growth will remain relatively strong compared to much longer‐term averages: growth from 1870–1950 was only around 2% per year. But a return to such low growth rates looks unlikely; China and India were a major drag on world growth until the 1980s but are now fast growing regions. Our forecast is relatively cautious about key growth factors; the contribution of productivity growth is expected to improve slightly, while those from capital accumulation and labour supply fall back. Demographics will be a more severe drag on growth from 2025–40. Overall, risks to our long‐term forecasts look to be skewed to the downside.