Although labor market recomposition plays a role. There's a major shortage of semi-skilled blue collar labor, leading to some of the strongest wage increases of

Although labor market recomposition plays a role. There's a major shortage of semi-skilled blue collar labor, leading to some of the strongest wage increases of any sectors in 2020. This includes construction[1], manufacturing[2], and logistics[3]. These workforces tend to skew older, and hence were more affected by workers dropping out due to Covid fears. Unlike traditional white collar professions, these are industries where workers are likely to take a second job. Particularly during boom periods when pay is attractive. It's very likely that at least some of the increase in second jobs is driven by rising secular wages in semi-skilled blue collar jobs. [1]https://www.tradesmeninternational.com/news-events/the-construction-labor-shortage-where-did-all-the-skilled-labor-go/ https://www.tradesmeninternational.com/news-events/the-const... [2]https://www.census.gov/library/stories/2020/11/manufacturing-faces-labor-shortage-as-workforce-ages.html https://www.census.gov/library/stories/2020/11/manufacturing... [3]https://www.joc.com/port-news/us-ports/warehouse-worker-scarcity-crimping-us-transloading-capacity_20200813.html https://www.joc.com/port-news/us-ports/warehouse-worker-scar...