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US Annual Working Hours per Worker vs US Adolescent Birth Rate

US Annual Working Hours per Worker and US Adolescent Birth Rate correlate at r = +0.81 over 64 years (1960–2023), p < 0.0001. With the time trend removed, r = +0.16. Likely spurious (shared time trend).

Verdict: Likely spurious (shared time trend). Both series mostly just trend over time. After removing that trend the correlation collapses to 0.16 — the relationship is probably coincidental, not causal.

Pearson r
+0.81
p-value
< 0.0001
Years compared (n)
64 (1960–2023)
95% confidence interval
0.70 to 0.88
Correlation with the time trend removed
+0.16

Sources

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Correlation does not imply causation. How the verdict is worked out.