The points at a distance from a factory where costs are equal to revenue and no profit is made; ‘when firms choose, intentionally or by accident, a location that falls within the so-called spatial margin of profitability, they have a better chance to survive and prosper’ (Boschma and Frenkma (2006) J. Econ. Geog. 6, 3). See also Boschma and Lambooy (1999) J. Evol. Econ. 9.
Subjects: Earth Sciences and Geography.