Science and Technology Parks (STPs) have proliferated in many countries as an innovation policy tool. Previous studies have mostly used a homogeneous approach, leading to mixed results. This paper aims to explore whether there are factors which generate heterogeneous STP effects on the quality of patents filed by tenants. Creating a novel database of Spanish patents generated on- and off-park, merged with firm and STP characteristics, we find that younger and larger firms benefit more from being on-park and younger and older STPs generate a higher effect on tenants’ patent quality, while STPs promoted by universities exhibit a lower effect.
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