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This paper investigates the heterogeneous effects of bribery on the productivity of small and medium-sized enterprises (SMEs) in Vietnam. Using panel data from the Vietnam Small and Medium Enterprise Survey (VSMES) and an instrumental variable approach to address endogeneity, we find that corruption generally reduces firm productivity. However, its impact varies across institutional contexts: the negative effect is stronger in provinces with efficient regulatory environments and weaker where firms face high bureaucratic burdens or identify government inefficiency as a key constraint. These findings support a weak form of the “grease the wheels” hypothesis, suggesting bribery may act as a costly coping strategy in poorly governed settings. The results highlight the importance of regulatory quality in moderating the effects of corruption and point to the need for reforms that address both corruption and bureaucratic inefficiencies.
Tomasi et al. (Tue,) studied this question.