population forecasts — Alpha.Sources

Audio Essay: The Demographic Transition

My second audio essay is now up. You can listen and download the file directly here, or alternatively subscribe to ‘Alpha Source Audio Essay’ Apple Podcast channel where my future audio essays will also be published. The link to the episode on Apple podcasts is here.

You can find and download all my economics and demographics essays in written form here , as PDFs. You can find links to all references on the landing page for my demographics work here. I plan on doing once a month of these audio essays, time permitting, on demographics, economics, finance and everything in between.

The Demographic Transition

This is the landing page for my most ambitious non-fiction project to date. My writings on demographics are scattered all over this blog—though my master’s thesis is a baseline for a lot of my thoughts—and so, incidentally, is the work of my late friend Edward Hugh on the same matter. Randy McDonald has been stalwartly keeping the old Demography.Matters blog up to date, an effort which is badly in need of a new more modern and well-publicised platform.

I have been thinking about and studying demographics and population dynamics for well over 10 years, and this is my attempt to synthesise my thoughts. I will warm up with a simple account of the demographic transition, posted below, before moving on to the principal components of this process; mortality and fertility. I will then, eventually, examine how demographics drive economic processes, principally via the effect of ageing on growth and capital flows, expanding on the work that I have already done. I will post this work in piecemeal fashion inviting comments as I go along before combining everything into a coherent volume. When Google first introduced its Blogger platform it did so, I believe, under the banner of perpetual beta, a spirit that I agree with. I will post a final, and fully edited, volume eventually, but I also want to draw back the curtain slowly and gradually, if only to keep up the publishing cadence on this site. The meaning of “landing page” in this context is no more than a repository for the list of references and the individual chapters, both of which will be updated here as I go along. Each chapter, however, will have its own independent permalink too.

China's Population

Last week we learned that China’s population shrunk last year, for the first time in 60 years, by 850K, the net result of 9.6M live births, and 10.4M deaths. It is worth taking these numbers with a pinch of salt. Accurately accounting for some 1.4B people is difficult, especially down to a sub-1M difference between deaths and births. It’s possible that future revisions will show that China’s population has been shrinking since the beginning of the 2020s, or that it won’t start shrinking until 2025 or beyond. What is clear for anyone with even cursory knowledge of Chinese demographics, however, is that this headline was coming sooner rather than later. China’s fertility rate has long since declined below the replacement level, and all-age mortality is now rising as the population ages. But does it matter that China’s population is now shrinking?

Mere Mortals no Longer?

The evolution of mortality through the demographic transition is as close as we come to a deterministic process in the analysis of population dynamics. Science and technology have become increasingly better at keeping people alive, a benefit that still seems to drive the human experience to this day. It’s possible to identify milestones through history such as the development of modern sanitation to defeat contagious air- and waterborne illnesses, the development of vaccines for specific illnesses, as well as overall technological development in the field of healthcare. It is a story about pinning down the causality between rising national income and technological development and the improvement in the human living condition in the past 250 years. Researchers still debate the relative importance and merits of specific drivers, but it’s possible to generalize, all the same. The story about of human mortality is contained in a few relationships, for the individual, between, and possibly within countries. It is a story about Nike swoosh-shaped, logarithmic and asymptotic curves, and the extent to which we observe deviations from such stylized relationships over time, and why.

02

Alpha Sources Blog