You're building next year's investment case, and R&D and operations are asking for a bigger share on the logic that they're the "real" drivers of results. Before you concede the point, look at the evidence: marketing capability tracks firm performance more closely than either one. A rival can benchmark your operation or read your R&D patents. It's much harder to copy the customer knowledge and relationships behind a strong marketing capability. That's the case for protecting it, not just funding it.
Of the three capabilities that drive firm performance, marketing's link to results is the strongest.
Pooling many studies across 30,000+ businesses, marketing capability shows a stronger link to firm performance than R&D capability or operations capability. All three matter, but the question worth asking before you cut a budget is which capability is hardest for a rival to copy.
Data chart
Marketing capability's link to firm performance is the strongest of the three, though all three matter.
Key takeaway
Of the three core capabilities, marketing's link to firm performance is the strongest.
Source
Krasnikov, A., & Jayachandran, S. (2008). The relative impact of marketing, research-and-development, and operations capabilities on firm performance. Journal of Marketing, 72(4), 1–11. https://doi.org/10.1509/jmkg.72.4.001
Evidence strength: Strong. Based on a pooling of 786 findings from 114 published studies covering more than 30,000 businesses; describes an association, not a proven cause-and-effect relationship, and does not establish industry-specific rankings or a case for reallocating a specific dollar amount.