Public vs Private Employment (indexed) — Methodology and Sources
What this measures
Public sector and private sector employment growth in Victoria, both indexed to 100 at FY 2014-15. Lets you see the two trajectories on a single axis without the scale of the private sector (~3.5M people) swamping the public sector (~400K).
How values are derived
For each FY:
- Public sector employment = sum of VPSC headcount categories
- Total employment = ABS 6202.0 Vic, FY mean of monthly Seasonally Adjusted observations × 1000
- Private sector employment = total − public
Then both series are divided by their FY 2014-15 value and multiplied by 100, so both start at 100 and the chart shows percentage change from base.
Why indexed, not absolute
The brief's "frog in the pot" framing — multi-year drift hidden by single-year reporting — is most visible when you can compare the rate of growth, not the levels. Index to 100 makes the comparison clean.
Chart note: re-used comparator slot
This chart re-purposes the nsw comparator slot in the metric schema to carry the "private sector" line, because the LineMetric type supports only Vic + NSW + QLD overlays. The NSW colour (amber) is therefore used for "Private sector". A future schema extension could support multi-series charts properly.
Caveats
- Public-sector figures: see Public Sector Headcount for the VPSC stitch methodology
- Private sector calculated by subtraction — includes anyone employed but NOT in the public sector categories, which means small definitional differences flow into private
- ABS Labour Force uses a household survey, so "total employment" includes self-employed, casuals, and workers across all industries
Sources
- Public sector: VPSC — State of the Public Sector (verified)
- Total employment: ABS 6202.0 Labour Force, Australia, Table 5 (verified)