A common starting index is an analytical choice

A common starting index is an analytical choice

Question. Did employment, population, and GNP grow at the same pace from 1947?

• Encoding. Three colored paths compare proportional movement after each series is rebased to its first value.
• Ordering. Chronological source years, without smoothing.
• Baseline. The reference 100 is imposed by rebasing; it is not an independently observed economic equality.
• Scale. One shared linear index scale for all three series.

What this design gives up

Original counts and nominal-output units are erased. Nominal GNP growth still includes price-level change.

This is a small historical regression benchmark, not a current labor-market dataset. GNP is nominal and source units are retained. Similar trends do not establish a stable causal employment model.