African Safety Engineering | 03 October 2009
Methodological Evaluation of Transport Maintenance Depot Systems in Tanzania Using Difference-in-Differences Approach
K, i, n, y, u, a, S, i, m, b, a, ,, S, e, m, e, d, i, M, w, e, b, a, z, e
Abstract
This study examines transport maintenance depots in Tanzania to evaluate how they are being adopted. A DiD approach was employed, comparing pre- and post-intervention periods for depots with different characteristics. In one depot, we observed an 18% increase in adoption rate within six months following system implementation. The difference-in-differences model effectively measured the impact of new transport maintenance systems on depot adoption rates. Further studies should consider long-term effects and incorporate additional variables to enhance model robustness. transportation, maintenance depots, DiD model, adoption rate The maintenance outcome was modelled as $Y<em>{it}=\beta</em>0+\beta<em>1X</em>{it}+u<em>i+\varepsilon</em>{it}$, with robustness checked using heteroskedasticity-consistent errors.