Does Adding Workers Add Output? Workforce Expansion and Productivity in Small and Large Firms: Exploratory Panel Evidence from Uzbekistan

Whether workforce expansion translates into output depends on an organization’s capacity to absorb new people. Drawing on Penrose’s theory of managerial capacity and on small-business HRM research, we ask whether the output response to headcount growth differs between small and large firms in an emerging economy. We use a panel of nine enterprises in the Bukhara region of Uzbekistan for 2015–2023 (74 screened firm-year observations) and estimate the within-firm output elasticity of headcount with firm and year fixed effects, wild-cluster bootstrap and randomization inference. In larger firms, the point estimate is positive, but below one; in small firms (under 50 employees), it is negative in the preferred specification: in this panel, small firms that added workers did not add nominal output. We treat this pattern as exploratory and report its fragility in full: it is at most marginally significant (bootstrap p = 0.06; randomization p = 0.06 on the coefficient, 0.18 on the t-statistic), only with workforce-composition controls, only contemporaneously, and it is identified from two firms. Because output is nominal and capital, intermediate inputs and demand are unobserved, and the estimates describe within-firm co-movement rather than real productivity effects. Wages co-move positively but imprecisely with output; the educational composition of staff is unrelated to it. Enterprise-reported cost data underlying the ‘personnel-potential utilization’ coefficients used in regional practice show a pattern consistent with normative rather than observed reporting. The study documents a suggestive size asymmetry worth testing on a larger, representative panel, specifies the data such a test requires, and raises, as a question for further testing, whether headcount-based support metrics for small firms are aligned with output growth.