CHINA’S economy, worth over $9 trillion in 2013, divides opinion. Often it divides it neatly in two: optimists contend with pessimists, apologists with alarmists, bulls with bears. Figures released this month encouraged both camps. China’s economy grew by 7.7% in 2013, a little faster than once feared. But a widely watched index of manufacturing, published by HSBC, a bank, fell for the fourth month in a row.
This binary split in opinion is too crude. To understand China’s economy today, it is more helpful to think in threes. Start, for example, with three forms of growth: in supply, demand and credit. Over the long run, China’s economic might depends on the size of its workforce and its productivity. This combination determines how much stuff China can supply without overstretching itself. Numbers released this week confirm that the supply-side limits on growth are gradually tightening.