In the aftermath of the 1991 recession, which was the worst economic downturn in Australia since the Great Depression of the 1930s, I wrote a series of articles that we published in academic journals. In part, they were theoretical pieces that conjectured about the impact of rapid population growth on the labour market, which at the time was characterised by persistently high unemployment and rising underemployment (the recession had replaced full-time with part-time work). My conjecture was that high rates of immigration at a time of slow employment growth would lock unemployed workers into long-term unemployment. Of course, I could not test that proposition because the government maintained the relatively high immigration levels and other factors might have been responsible for the rising long-term unemployment. Last week’s Australian Labour Force data showed that unemployment and the unemployment rate has fallen rather quickly in recent months as the economy recovers slowly from the pandemic recession. Historical comparisons show the unemployment response this time has been much larger than in the previous recessions. The other key point is that the working age population has grown at historically low rates as a result of the border closures. It seems that my conjectures in the early 1990s were correct, despite getting flack at the time from mainstream economists who were pushing the line that immigration is always good for the labour market.