Advanced measurevolatility
Volatility
How much the weekly ad count bounces around over the last 12 weeks.
SkillsRolesIndustries
Definition
Exactly what it counts
- Unit
- Coefficient of variation
- Out of
- Average weekly ads over 12 weeks
- Time window
- 84 days, ending with the latest complete week
- Sample
- At least 30 ads, otherwise we say “not enough ads” and draw nothing
- Available after
- 84 days of tracking for an item
- How it’s measured
- Standard deviation divided by the mean of 12 weekly counts. Under 0.15 is steady.
- Known limits
- Holiday weeks raise volatility for everything.
- Source
- Job ad aggregatefor skillsJob ad aggregatefor rolesJob ad aggregatefor industries
Examples
What it looks like
Across Australia, all levels, this week.
Signals
How signals use it
Not used for signals. It’s here to give context next to demand, not to tell you when to act.