Courtesy of Mish.
Via Email, Michael Pettis at China Financial Markets quantifies various growth and investment scenarios. Pettis maintains 6% or higher growth is not plausible and that even 3-4% growth may be optimistic. What follows is from Pettis …
Consumption and Investment Growth Under Rebalancing
Under specified rebalancing assumptions for China it is possible to calculate arithmetically the annual growth rate for consumption and investment under different GDP growth scenarios. This allows us to decide whether these scenarios are plausible or not.
Table: GDP, consumption, and investment growth in a rebalancing China
To read the table, let us start by assuming, as an example, that we believe the average GDP growth rate over the ten-year period will be 6%. For China to do a minimal amount of rebalancing that gets consumption to 50% of GDP and investment to 40% of GDP, we can quickly figure out what the corresponding growth rates of consumption and investment must be. Consumption must grow by 9.9% a year and investment must grow by 4.5% a year to get us there.
Notice the reason why I do it this way rather than the “normal” way most other economists would. Instead of estimating what I expect the growth rates in consumption and investment will be, and then calculating the implicit GDP growth rate from those numbers, I start with an assumed GDP growth rate and then calculate what the implicit growth rates in consumption and investment must be in order for rebalancing to take place. I am not making predictions, in other words. I am simply working out logically what any GDP growth rate must imply in terms of consumption and investment growth rates in order for China to rebalance.
This allows me to make statements like this: If you think that China’s GDP will grow by 7% a year over the next decade, and if you expect a minimal amount of rebalancing, then you are implicitly predicting that consumption will grow by 10-11% a year for ten years and that investment will grow by 4-5.5%. If you believe these two implicit predictions are plausible, then your 7% prediction is also plausible.
I want to state again that these numbers are not predictions. They are simply the arithmetically necessary growth rates that are consistent with our assumptions. To return to the interpretation of the table, let us assume again that China does the minimal amount of rebalancing so that in ten years household consumption is 50% of GDP and investment is 40% of GDP, what are the investment and consumption growth rates consistent with, say, 6% GDP growth, and are they plausible?
It turns out that average GDP growth rates of 6% require, as an arithmetical necessity, that household consumption grow by 9.9% a year over the next ten years and that investment grow by 4.5%, after many years of high double digit growth and more recently growth in the low double digits. Is this plausible?
I would argue that positive investment growth rates for another ten years are highly likely to result in our reaching debt capacity constraints well before the end of the decade, so I am skeptical about the investment implications of this scenario. By the way some analysts have mischievously pointed to the very poor construction quality in China to argue that investment growth rates have to stay high just in order to account for higher-than-estimated depreciation costs, and that this suggests that China can grow faster than what we might otherwise assume.
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