Variable | High-Income | Upper-Middle-Income | Lower-Middle-Income | Low-Income | ||||
---|---|---|---|---|---|---|---|---|
Model 1 | Model 2 | Model 1 | Model 2 | Model 1 | Model 2 | Model 1 | Model 2 | |
GDP | 1.744*** | 1.934*** | 1.375*** | 1.432*** | − 1.330*** | −1.273*** | − 7.961*** | − 8.760*** |
 | (0.005) | (0.005) | (0.021) | (0.020) | (0.004) | (0.004) | (0.013) | (0.014) |
GDP2 | − 0.055*** | − 0.073*** | − 0.053*** | − 0.058*** | 0.123*** | 0.113*** | 0.706*** | 0.739*** |
 | (0.008) | (0.008) | (0.016) | (0.015) | (0.005) | (0.005) | (0.018) | (0.018) |
ENG | 0.988*** | 4.228*** | 1.086*** | 1.645*** | 0.474*** | − 0.441*** | 0.877*** | − 1.189*** |
 | (0.009) | (0.009) | (0.031) | (0.030) | (0.009) | (0.010) | (0.019) | (0.019) |
EDU | 0.806*** | 1.578*** | − 0.013 | − 0.002 | 0.216*** | 0.566*** | 0.541*** | 2.167*** |
 | (0.009) | (0.009) | (0.025) | (0.024) | (0.008) | (0.008) | (0.007) | (0.007) |
ENG*EDU |  | − 0.694*** |  | − 0.197*** |  | 0.179*** |  | 0.485*** |
 |  | (0.014) |  | (0.027) |  | (0.011) |  | (0.019) |
R-Squared | 0.993 | 0.995 | 0.998 | 0.998 | 0.972 | 0.972 | 0.868 | 0.888 |