<b>Why partner-sourced win rates are confounded — and what to control for</b>

<b>Why partner-sourced win rates are confounded — and what to control for</b>

A seductive but flawed analysis: compare win rates of partner-sourced versus direct-sourced deals, declare the higher one 'better.' Win rate by source is one of the most confounded metrics in channel analytics.

<b>The confounders, in order of severity:</b>

— Deal stage at handoff: partners often pass deals already qualified and warm, inflating apparent win rate relative to direct deals tracked from cold outreach. You're comparing different starting points.
— Deal size: if partners work smaller, simpler deals, higher win rates reflect easier deals, not better sourcing.
— Account fit: partners may self-select well-fit accounts, so the win rate measures their selection, not their influence.

<b>The correct comparison.</b> Match deals on stage, size, and segment before comparing win rates by source. Per causal-inference practice, unmatched source comparisons are uninterpretable — the source variable is entangled with everything that actually drives wins.

<b>A reporting trap.</b> Dashboards show win rate by source as a single clean number, which gives the confounded comparison a false air of rigor. The cleaner the chart, the more it hides.

<b>The trade-off in fixing it.</b> Proper matching shrinks sample sizes (few deals match exactly on all dimensions), trading interpretability for statistical power. You can have a comparison that's clean or one that's robust; rarely both at portfolio scale.

<b>Implications:</b> a higher partner win rate is a hypothesis, not a finding, until you've matched on stage, size, and fit. Most programs report the hypothesis as if it were the finding.