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How Important Are Scale Effects for Growth When Knowledge Is a Public Good?
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In this paper, by proposing an R&D accumulation law for an economy with an expanding number of firms, I seek to reconcile the following three facts: the positive relationship between the fraction of income allocated to R&D expenditure and growth; the positive relationship between the number of firms and total factor productivity growth; and knowledge as a non‐rival and non‐excludable good. There are scale effects because of the public nature of knowledge, but the economy also grows in the absence of population growth. I find that population growth explains one‐fifth of market income growth but only one‐sixteenth of efficient income growth.
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SÁNCHEZ-LOSADA, Fernando. How Important Are Scale Effects for Growth When Knowledge Is a Public Good?. The Scandinavian Journal of Economics. 2019. Vol. 121, num. 2, pags. 763-782. ISSN 0347-0520. [consulted: 28 of August of 2026]. Available at: https://hdl.handle.net/2445/175959