Michael Pettis Profile picture
Oct 10, 2021 11 tweets 3 min read Read on X
1/7
Very interesting article. A series of Chinese studies may be discovering something about the high-speed rail system that France had already learned: rather than boost the economies of secondary cities, being connected...

scmp.com/news/china/sci… via @SCMPNews
2/7
to the HSR may actually reduce economic activity and encourage a brain drain. Even patent applications in secondary cities have dropped significantly, according to one study, after the city was connected to a high-speed line.
3/7
If this is true, it undermines the claim that even if much of the HSR is not economically viable today, it will generate enough growth in the less economically advanced areas to become viable in the future. The value of HSR is more likely to decline than to increase.
4/7
This reinforces a point I have made many times before, including in the linked essay. The idea that concentrating investment in poorer regions will drive economic convergence is based on a confusion about what drives growth.

carnegieendowment.org/chinafinancial…
5/7
Poorer regions are usually poorer because their social, economic, legal, and cultural institutions prevent businesses and workers from being able to absorb high levels of capital productively.
6/7
In that case more investment only generates sustainable growth when these regions are relatively underinvested, and this doesn't mean relative to more advanced regions but rather relative to their own specific institutional capacity (what I call the Hirschman level).
7/7
Once each region has as much investment as it can productively absorb — and in China most regions reached that point well over a decade ago — more investment doesn't help. What it needs is more institutional reform.
1/4
The point of this thread is not to suggest that investment in HSR, or capital deepening more generally, is economically a bad idea. It is in fact often a very good idea – for example infrastructure investment in China in the 1990s, or in the US today – but we should ...
2/4
understand both the conditions under which it can accelerate economic development and those under which further economic development will not occur without the right institutional reforms, in which case further capital deepening can actually reduce future growth.
3/4
As a corollary, the longer an investment-driven growth model has proven successful, the more politically entrenched it is likely to become – that is certainly what the historical precedents suggest – but in fact the less successful it is likely to be...
4/4
in the future as it closes the gap between actual investment and the amount of investment the region can productively absorb.

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More from @michaelxpettis

May 24
1/8
I just finished reading Chris Miller's excellent book on the collapse of the Soviet Economy. Some people might think that the topic is interesting, but largely irrelevant to global economic conditions today. They would be mistaken. This is a very relevant book.
@crmiller1 Image
2/8
Among the important points it makes is this: "The notion that political and economic reforms were separate processes misunderstands Soviet politics. The most decisive debates during the perestroika period were about the distribution of economic resources."
3/8
Miller notes that China's reforms began in the late 1970s, when its economy was in such terrible shape that they resulted in an immediate surge in productivity, the benefits of which could be used effectively to buy off potential elite opposition (especially in the 1990s).
Read 8 tweets
May 22
1/9
SCMP: "To address widening trade imbalances across the Asia-Pacific region, surplus-heavy nations such as China should be buying more, and deficit-running economies need to bolster their competitiveness, a top Apec official said on Thursday."
sc.mp/y49ox?utm_sour…
2/9
The article continues: "Carlos Kuriyama warned that structural imbalances would remain wide in the near future and cautioned that protectionist responses could exacerbate regional fragmentation rather than resolving underlying issues."
3/9
We are definitely in the age of Joan Robinson. She warned that large, beggar-thy-neighbor trade surpluses would eventually force deficit countries into protectionist retaliation which could lead to a breakdown in trade that would harm the global economy.
Read 9 tweets
May 20
1/10
Important FT article by Mark Sobel, Brad Setser and Robin Brooks. They make the seemingly counterintuitive point that while incremental trade agreements, in which one side or the other agrees to buy a little more of this or a little less of...
ft.com/content/b600db…
2/10
that, may impress policymakers (and dealmakers) who don't understand trade – or, for that matter, how the balance of payments work – in fact they have no impact at all on the overall trade imbalances.
3/10
Whether or not China buys more soybeans or Boeings might matter to American soybean farmers or to Boeing shareholders, in other words, but it will have no impact on either the American trade deficit or on overall American deindustrialization.
Read 10 tweets
May 18
1/5
It’s hard to know how significant this is, given the uncertainties created by the war, but April numbers were terrible for China. Industrial output grew 4.1% year on year in April, well below expectations.
bloomberg.com/news/articles/…
2/5
For the first four months of 2026, industrial output grew 5.6%. Against this, retail sales grew by a measly 1.9% year on year in the first four months of 2026, and by a shocking 0.2% in April.
3/5
Overall consumption growth is almost certainly a little higher, but it is hard to explain such a large gap between production and consumption except if more production is not resulting either in higher wages, higher profits, or stable household confidence.
Read 5 tweets
May 17
1/4
NYT: "President Trump departed Beijing on Friday, touting trade deals to sell American-made airplanes, farm goods and other products, the signature outcome of his two-day summit with Xi Jinping, China’s top leader."
nytimes.com/2026/05/15/bus…
2/4
This is the kind of thing that confuses far too many policymakers and analysts. China's huge trade surplus is the result of income distribution and transfer policies that force Chinese production to exceed, by a large margin, China's total consumption and investment.
3/4
The US trade deficit is largely driven by the extent to which economies with trade surpluses decide to balance those surpluses by acquiring US assets.

The purchase commitments last week will have no impact on either, and so won't change the imbalances.
Read 4 tweets
May 16
1/12
Very good article by Greg Ip. I think the most important point he makes is this one: "The Achilles’ heel of Chinese industrial policy is its cost and waste. China runs bigger budget deficits relative to economic output than the U.S."
@greg_ip
wsj.com/world/china/be…
2/12
Most trade and industrial policy consists effectively of transfers from less favored to more favored sectors. In China's case this has meant very large explicit and implicit transfers from the household sector to subsidize infrastructure and manufacturing investment.
3/12
Other countries have followed similar policies, but this was taken to such an extreme in China that one result has been the lowest consumption share of GDP and the highest investment share ever seen in history (no other country even came close).
Read 12 tweets

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