The "my nephew can build it" pattern — loss-aversion on the invoice + overconfidence on in-house execution as mechanistically linked

Claim (applied inference): GC owners simultaneously display loss-averse cognition toward a Candid invoice and overconfidence about an in-house alternative ("my admin can build the site," "my nephew does this stuff"). These are not contradictory — they are mechanistically linked.

• The financial decision is evaluated in the loss domain against the steep value-function slope ([[kahneman-tversky-prospect-theory-loss-aversion-2to1]], [[brown-imai-vieider-camerer-2024-meta-analysis-lambda-1955]]).
• The in-house execution decision is evaluated in the gain domain through a representativeness heuristic ([[busenitz-barney-1997-entrepreneur-vs-manager-overconfidence]]) that compresses the actual probability of execution failure ([[cooper-woo-dunkelberg-1988-entrepreneur-overconfidence-81pct-33pct]]) via reference-group neglect ([[camerer-lovallo-1999-overconfidence-reference-group-neglect]]).

The cheapest Candid pitch to defeat is one whose comparator is "having my cousin do it" left implicit. Pitches must surface the comparator explicitly and reframe the in-house alternative as a bet, not as a default no-cost option.

Confidence: Applied inference from the underlying overconfidence literature. Research gap: no field studies specifically on owner-operator construction businesses evaluating in-house alternatives to professional services ([[risk-aversion-brief-research-gaps-may-2026]]).

For Candid: The question to put on the table is not "will you hire us?" but "what is your plan and what is the probability of execution failure?" The cousin-builds-it option has a probability of failure too, and the comparison is genuinely apples-to-apples once both sides are made explicit. Most GCs have never been asked to evaluate the in-house option against its base rate.

Operationalized as: [[rule-surface-and-reframe-in-house-comparator]].