| L.ln_oda | Lagged official development assistance | Natural log(lagged one period) | World Development Indicators |
| L.ln_gdp per capita | Lagged GDP(economic size) | Natural log(lagged one period) | World Development Indicators |
| ln_natres | Natural resource rents | Natural log of % of GDP | World Development Indicators |
| ln_tradeopen | Trade openness | Natural log of (exports+imports)/GDP | World Development Indicators |
| ln_tel | Telecommunication infrastructure | Natural log of telephone subscriptions per 100 people | World Development Indicators |
| ln_edu | Human capital | Natural log of average years of schooling | World Development Indicators |
| COC | Control of corruption | Governance index | World Development Indicators |
| ODA×COC | ODA×control of corruption | Interaction betweenln_oda and COC | World Development Indicators |
| GE | Government effectiveness | Governance index | World Development Indicators |
| ODA×GE | ODA×government effectiveness | Interaction betweenln_oda and GE | World Development Indicators |
| PS | Political stability and absence of violence | Governance index | World Development Indicators |
| ODA×PS | ODA×political stability | Interaction betweenln_oda and PS | World Development Indicators |
| RQ | Regulatory quality | Governance index | World Development Indicators |
| ODA×RQ | ODA×regulatory quality | Interaction betweenln_oda and RQ | World Development Indicators |
| RL | Rule of law | Governance index | World Development Indicators |
| ODA×RL | ODA×rule of law | Interaction betweenln_oda and RL | World Development Indicators |
| VA | Voice and accountability | Governance index | World Development Indicators |
| ODA×VA | ODA×voice and accountability | Interaction betweenln_oda and VA | World Development Indicators |