When startups hit hypergrowth, something shifts. A study of over 31,000 Swedish ventures shows that rapid scaling often triggers the very biases founders didn't know they had.
Researchers at Stockholm School of Economics analyzed hiring patterns from 2004 to 2018 and found that male-led startups scaling quickly reduced their odds of hiring women by 18% and appointing them to management roles by 22%. The pattern held even for female founders — they showed similar (though slightly smaller) drops when growing fast.
"During those moments of rapid growth, even well-intentioned leaders can fall back on familiar stereotypes when assessing who they believe is best suited for the role," says Mohamed Genedy, the study's co-author. It's not malice. It's what happens when your brain is running on fumes and you need to fill 20 roles in three months.
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Start Your News DetoxThe HR advantage
Here's where the story shifts. Founders with HR training or education reversed the trend entirely. In ventures led by HR-educated founders, the odds of hiring women jumped by more than 30% during scaling, and management appointments increased by 14% for the same growth rate.
The difference wasn't about good intentions. It was about process. Structured hiring practices — job descriptions written before the panic, diverse candidate pools built in advance, evaluation criteria set on paper rather than improvised in a meeting — these basics created enough friction to interrupt the bias reflex.
"When founders have experience with structured hiring practices, the gender gaps shrink, and in some cases even reverse," Genedy explains. "When things start moving fast, founders with HR knowledge are less likely to rely on biased instincts and more likely to hire from a broader talent pool."
The research suggests this isn't about founder gender or industry type. Female-dominated fields still saw women hired for entry roles but passed over for leadership when scaling accelerated. Cognitive bias, it turns out, doesn't care about your intentions or your identity — it cares about time pressure and mental bandwidth.
The implication is straightforward: if you're building something that might scale, the HR fundamentals aren't a luxury add-on for when you're big enough. They're preventative infrastructure. Getting hiring right before you're desperate to fill seats costs almost nothing and apparently saves you from accidentally building a company that looks nothing like the one you meant to build.
