Table 6.
Main Specification for the Pairwise Analysis of Adjacent Regions
| (1) | (2) | (3) | (4) | (5) | |
|---|---|---|---|---|---|
|
| |||||
| VARIABLES | Percentage of Common Languages | ||||
| Difference in Land Quality | −0.111*** (0.032) | −0.038*** (0.012) | −0.054*** (0.018) | −0.048** (0.021) | −0.056*** (0.016) |
| Difference in Elevation | −0.091*** (0.014) | −0.051*** (0.006) | −0.050*** (0.016) | −0.046** (0.022) | −0.053*** (0.009) |
| Geodesic Distance Within the Pair | −0.244*** (0.050) | −0.303*** (0.039) | −0.382*** (0.041) | −0.199** (0.074) | −0.274*** (0.051) |
| Migratory Distance from East Africa | 0.005*** (0.002) | −0.010 (0.078) | −0.021 (0.146) | −0.040 (0.192) | 0.232** (0.093) |
| Absolute Latitude | 0.005*** (0.001) | 0.077*** (0.026) | 0.006 (0.025) | −0.008 (0.049) | 0.093** (0.042) |
| Mean Elevation | −0.006 (0.013) | −0.006 (0.028) | 0.011 (0.044) | 0.040 (0.051) | 0.010 (0.046) |
| Mean Land Quality | −0.004 (0.024) | −0.003 (0.014) | 0.021 (0.037) | 0.018 (0.061) | −0.026 (0.034) |
| Mean Precipitation | −1.270*** (0.130) | 0.089 (0.152) | −0.639 (0.661) | 0.116 (0.646) | −0.004 (0.194) |
| Mean Temperature | 0.001 (0.002) | −0.002 (0.007) | −0.008 (0.007) | −0.008 (0.010) | 0.004 (0.010) |
| Sea Distance | −0.015 (0.014) | −0.138 (0.114) | −0.034 (0.120) | −0.039 (0.212) | −0.375*** (0.073) |
| Water Area | −0.012 (0.018) | −0.007 (0.010) | −0.009 (0.012) | −0.009 (0.019) | 0.004 (0.011) |
| Ln(Population Density in 1995) | −0.005 (0.005) | −0.003* (0.002) | −0.005 (0.004) | −0.000 (0.008) | 0.003 (0.002) |
| Ln(Area) | 0.106*** (0.016) | 0.034*** (0.010) | 0.068*** (0.020) | −0.029 (0.026) | 0.014 (0.012) |
| Within Country Indicator | 0.144*** (0.010) | 0.155*** (0.009) | 0.136*** (0.012) | 0.344*** (0.015) | 0.145*** (0.012) |
|
| |||||
| Region FE | N | Y | Y | Y | Y |
| Observations | 156,570 | 156,570 | 35,305 | 11,975 | 74,830 |
| R2 | 0.28 | 0.73 | 0.74 | 0.70 | 0.72 |
Nonstandardized coefficients reported, standard errors in parentheses clustered at the country level.
***
p < 0.01;
**
p < 0.05;
*
p < 0.1
Specification (3) focuses on pairs within Africa, (4) on pairs within Europe, (5) on pairs within Asia