Why numbers work
Numbers can show scale and make comparisons easier, but only when the number is accurate and meaningful. "Improved customer satisfaction" is vague. "Increased NPS from 42 to 67" gives the reader a specific result to evaluate.
Bock's insight was that most candidates undersell themselves by describing responsibilities instead of results. The formula encourages you to lead with the outcome, not the activity.1
A separate field experiment with nearly half a million jobseekers found that algorithmic writing assistance improved measurable writing quality and increased hires by 8%, without evidence of lower employer satisfaction. It tested broad writing assistance, not Bock's formula, quantified bullets, or one specific rewrite pattern.2
Finding numbers when you think you don't have any
Illustrative examples, not benchmarks.
An illustrative before and after
The facts and numbers below belong to the example. A real rewrite must use details you can support.
Before: "Responsible for managing social media accounts and creating content."
After: "Grew Instagram following from 5K to 45K in 8 months by creating a data-driven content calendar that increased engagement rate from 2% to 8%."
The second version gives the reader a clearer result to evaluate.
Give the reader the context behind the result
A number without context can still mislead. "Cut time by 40%" leaves the reader asking: time spent on what, compared with when, and what did you change? Include those details when you can verify them.
What the evidence does not prove
- •Bock's X–Y–Z formula is experienced practitioner guidance, not a controlled trial.
- •The NBER experiment studied an online labor market and bundled several forms of writing help.
- •Neither source justifies inventing a metric or forcing a number into every bullet.