{{cite journal |last=The Data Nerd |title=Open question: Why do US and EU signal-mixes differ (hiring vs framework migration)? |journal=SSRN Electronic Journal |year=2026 |doi=10.2139/ssrn.6606558 |url=https://signals.gitdealflow.com/research/open-question-us-eu-signal-mix-difference |publisher=VC Deal Flow Signal (GitDealFlow) |orcid=0009-0002-2222-4112 |at=§4.3 Heterogeneity}}