This post follows up on my review of Tom Orlik's wonderful book "China: The Bubble that Never Pops". The book explains why constant predictions of China's economic collapse due to mounting debt and financial risk have not been borne out, and the explanation is altogether compelling. My one quibble with the book regards Orlik's view of the underlying driver of the saving/consumption imbalances that motivated debt driven stimulus. Orlik emphasizes China's one-child policy as the source of the imbalances, going so far as to call it China's original sin in an interview. The argument is that with China's weak social welfare system, having only one child makes for insecurity about old age that induces parents to save more during their working years. I'm not convinced that this holds up as a reason for China's imbalances. Let me hasten to add that, regardless, the book's original contribution in explaining why no crash has occurred holds up very well. The source of the imbalances is a separate issue, but one worth pursuing in its own right.
There is a sense in which I agree that the one-child policy has been a factor in China's high saving. The exceptionally sharp decline in the birth rate in China's case accentuated the demographic transition that is common among countries during economic development. A couple of decades on, the drop in the birth rate brings a bulging labor force relative to a shrinking share of old and young age dependents in the population. Per the life cycle hypothesis of Modigliani (1970), saving is done by those in their working years who generate income whereas the young and old consume without producing any income from which to save. The decline in China's dependent share was particularly steep in the 2000-aughts and relatedly, so was the rise in the saving rate, as shown by Bonham and Wiemer (2013). So while the one-child policy mattered, it did not matter until two decades after it was introduced and not because it prompted precautionary saving to provide security in old age but because of the long-run demographic forces it intensified.
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