A large body of evidence documents differences in productivity across firms (Cette, Corde and Lecat, 2018[1]) and (Cunningham et al., 2022[2]). In several countries, a fat tail of low-productivity firms - composed in large part of small firms - coexists with large firms that are highly productive and exposed to international competition. To the extent that large firms can exploit increasing returns to scale, productivity tends to increase with firm size. Moreover, large firms tend to adopt new technologies more readily than small firms, although this is not necessarily the case for new or younger firms. Large firms also have easier access to finance and to foreign markets. The industry in which a firm operates is a further major determinant of its productivity performance.
While new small firms can also spur aggregate productivity growth when they exploit new technologies and stimulate productivity-enhancing changes by incumbents, severe economic downturns may lead to a missing generation of start-ups (OECD, 2023[3]). While this effect is usually marginal in the short term, the absence of these start-ups may affect long-term productivity, as they play a key role in competition, innovation (Kolev et al., 2022[4]), as well as in the diffusion of new technologies and business models (Criscuolo, Gal and Freund, 2024[5]).
Scale-up dynamics significantly influence firm productivity. Firms that scale up through employment tend to become more productive during their high-growth phase, gradually catching up with peers. In contrast, firms that scale via turnover often expand their workforce just before growth, which temporarily reduces productivity, but their productivity improves as employment stabilises during the growth phase (OECD, 2021[6]). Human capital (e.g. workforce skills, management skills) is another key factor that explains differences in productivity across firms (Criscuolo, Gal and Freund, 2024[5]; Criscuolo et al., 2021[7]).
In addition, the presence of highly productive multinational enterprises (MNEs) can also impact national productivity figures. On the one hand, they may create opportunities for local firms to benefit from knowledge spillovers (Javorcik, 2004[8]; Alfaro-Ureña, Manelici and Vasquez, 2022[9]). On the other hand, profit-shifting by MNEs to low-tax jurisdictions can artificially inflate productivity figures for such countries and complicate cross-country comparisons (Bricongne, Delpeuch and Lopez-Forero, 2023[10]).