Table 6. Air transport trade amount analysis
| Variable | fe | re | ht |
| ln_GDP | -4.731***(0.730) | 0.646***(0.248) | -3.207***(0.629) |
| ln_PERGDP | 5.702***(0.687) | 0.711***(0.258) | 4.296***(0.596) |
| ln_KGDP | 9.061***(2.367) | 6.199**(2.421) | 8.245***(2.349) |
| ln_KPERGDP | -8.773***(2.601) | -6.196**(2.676) | -8.044***(2.585) |
| ln_oilprice | -0.085(0.055) | -0.082(0.057) | -0.083(0.055) |
| ln_exchanges | -0.021(0.051) | 0.004(0.048) | -0.021(0.053) |
| ln_area | (omitted) | 0.099(0.166) | 1.741***(0.667) |
| ln_airport | (omitted) | 0.314(0.277) | 2.991***(1.074 ) |
| _cons | -84.884**(39.128) | -122.684***(40.200) | -117.960***(39.149) |
| R2 | 0.5230.5020.241 | 0.4860.8350.707 | |
| Hausman p-value | 0.000 | |
| obs | 747 | 747 | 747 |
주1: fe는 고정효과모형, re는 확률효과모형, ht는 하우스만 테일러모형.
주2: *, **, *** 는 각각 10%, 5%, 1% 유의수준에서 유의미한 결과임.
주3: R2는 within, between, overall 순서임.
주4: p-value<0.01이면 H0 : cov(xi,t, ui = 0을 기각하여 고정효과모형이 일치추정량임.