Yes, the composition of students changed. There are now far more undergraduate students than before and undergrads largely don't stay (nor largely, can they stay as they can't get employment visas and greencards). However, from both the NSF Survey of Earned Doctorates as well as OPT and EB2 filings, we know that graduate students largely stay in the US. There's a 300K backlog of employment based greencards for China and a graduate degree is functionally needed for a green card to be granted.
You didn't read the articles posted. The rate of direct stay after graduation and is not the rate of eventual return as many decide to stay in the US for more experience working a few years before returning. This is adressed in the articles I posted.
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Simple
Total Births in the 1950s: 203.3M (enter workforce, 1970s, leave workforce 2010s)
Total Births in the 1960s: 239.9M (enter workforce, 1980s, leave workforce 2020s)
Total Births in the 1970s: 218.9M (enter workforce 1990s, leave workforce 2030s)
Total Births in the 1990s: 209.5M (enter workforce 2010s, replacing the 1950s cohort, change, +6.2M)
Total Births in the 2000s: 163M (enter workforce 2020s, replacing the 1960s cohort, change, -76.9M)
Total Births in the 2010s: 146.2M (enter workforce 2030s, replacing the 1970s cohort, change -72.7M)
There's a net change of -146M working age people that's largely written into the stars (and there is no real fix, there aren't 146M people in the world willing to migrate to China, even if China opened up)
Your change compares numbers from the 1970s to the 2030's. They detail the changes from a time when China's economy was in a state that resembled India's, which is primitive and driven by young bodies that can work hard physically. But two forces will ensure that China's demographics will not be an issue. Firstly is technology, which guarantees that while China's workforce will shrink during this time period, the actual production increases and growth is maintained. Manual labor is replaced with machine work. Secondly, there is a difference between overall workforce, which includes everyone doing the cheapest labor in the countryside which barely does anything more than stay alive (the peripheral workforce) and the high production, educated labor force, which is what ultimately determines a country's productivity. With China's education drive and poverty eradication, much of China's peripheral population that used to do low value manual labor are able to enter the educated workforce and become true assets. China's strength doesn't come from population growth; the period of strong population growth did not bring about high economic benefits. China's strength come from strengthening its educated workforce and reducing its peripheral one. So less overall population, higher STEM-educated workforce, leaner and stronger. Those 2 things are the key to transforming China from a country like India to a country stronger than America.
China removed the one-child policy in 2015. Since 2015 to 2021, the number of births went from 16.6M to 10.6M. Clearly incredible work.
"China’s rapid growth period came not from population
growth but from population
migration. The movement of people from poor rural areas to China’s cities may be the largest migration in human history. This migration shifted people from low productivity farm work to higher productivity factory work, and it was enabled by the government’s tolerance of entrepreneurship."
China has a huge cushion. Implementing the 2 child policy meant that China was still hesitant to let the population expand, but wanted something closer to maintenance. A population where no woman may have more than 2 children was not designed to expand but to contract slower. And the CCP wanted a smaller but leaner population as outlined above. In this time, the CCP learned that there were other barriers like a cost of education on the gray market that was holding birth rates down. So only in this year, have they removed the 2 child limit going for a 3 child limit, and started attacking gray market prep schools. Like I said, many tools just coming into play with a huge cushion and a dynamic that does not require population maintenance or growth to achieve growth/modernization.
China's also largely running out of time since increasing urbanization and a decreasing number of women of childbearing age will only force birth rates down, no matter what else China does. Beijing and Shanghai have TFRs lower than *Japan* already
Time for what? China's growth does not depend on population growth; it reduces its uneducated labor force and transforms them into the educated core labor force. It's cutting the fat and becoming leaner.
Correct. Brain drain is good for the recieving country (the United States) and bad for the sending country since they contribute more to national fiscal balances than they draw out.
It's good and bad in separate ways. It's good for the US because the US needs smart people. It's good for China because brain circulation back fast-tracks China's development in areas where it could use a boost. So far, the result is that China far outgrows the US.