Publication
Conversion, not complementarity: Why UK small-firm climate action is gated by capacity, not bundled capability
Published: 12 November 2026
ERC Research paper 128
Associated Themes
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Longitudinal Small Business Survey
Small and medium-sized enterprises account for most of the UK’s firms, most of its private-sector jobs and a large share of its business emissions, yet a stubborn regularity shapes how their behaviour is read: most small firms say the environment matters, but far fewer measure emissions or take concrete steps. Policy has treated this priority–action gap as a shortfall of capability or commitment to be topped up, and has assumed that support measures — finance, innovation and engagement — reinforce one another when bundled. This paper argues that both assumptions mis-specify the problem.
We advance a conversion view in which priority and action are distinct states separated by a step gated by organisational capacity rather than by disposition. Testing four hypotheses on two independent, officially commissioned UK surveys — the Longitudinal Small Business Survey (LSBS, ~50,600 firms, 2015–2024) and the British Business Bank’s Business Finance Survey (BFS, ~9,999 firms, 2021–2025) — compared in parallel on a harmonised firmographic grid, we establish two robust findings. First, environmental capabilities do not compound: finance, innovation and climate engagement each raise productivity alone, but they never interact positively, and finance and innovation actively substitute in small and medium firms. Second, the priority–action gap is capacity-gated: it narrows sharply with firm size and survives every specification, strengthening under the survey design weight that scales the oversampled medium firms down. Two further results — an energy-concentrated response to the 2022 price shock, and the absence of a large legitimacy-driven minority gap — hold as scope conditions consistent with the conversion view.
The implication is structural rather than incremental. If conversion, not commitment, governs the gap, then a large body of attitude-based SME research is mis-specified and capability-bundling policy is aimed at the wrong target. The leverage point is building conversion capacity in the smallest firms, not layering additional support measures on a commitment that is already present.
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