Asymmetric Effect of Shadow Economy on Environmental Pollution in Egypt: Evidence from Bootstrap NARDL Technique

This study examines the asymmetric effect of shadow economy (SE) on environmental pollution in Egypt during the 1970 and 2022 period. Using the bootstrap nonlinear autoregressive distributed lag (NARDL) bounds-testing approach, the study presents evidence of nonlinear cointegrating relationship between environmental degradation (carbon emission) and shadow economic activities (alongside globalisation, urbanisation, size of economic activity, industrial growth). In addition, the results demonstrate that the impact of shadow economy on environmental pollution (Env) is nonlinear, with the positive shock in shadow economy promoting environmental degradation and negative shocks promoting environmental quality, both in the short- and long-runs. However, the study discovered that the magnitude of the impact of the SE on Env is larger in the short-run. This is further validated by the dynamic nonlinear ARDL simulations technique which demonstrates that the short-run effect of the SE on Env is large. Additionally, the results suggest that income growth, urbanisation, and industrial growth are important drivers of environmental pollution. Therefore, the study recommends the adoption, and most importantly implementation, of policies and strategies geared towards reducing the shadow economy, and consequently environmental pollution.