Table 4. Air transport export amount analysis with FTA countries
| Variable | fe | re | ols |
| ln_GDP | -1.0458*** (0.380) | 1.1890*** (0.151) | 1.3774*** (0.045) |
| ln_PERGDP | 2.4181*** (0.390) | -0.0711 (0.146) | -0.4751*** (0.040) |
| ln_KGDP | 11.7387*** (1.726) | 9.7871*** (1.693) | 10.0547*** (2.208) |
| ln_KPERGDP | -12.2100*** (1.887) | -10.1430*** (1.867) | -10.2635*** (2.449) |
| ln_area | (omitted) | -0.2353** (0.107) | -0.3647*** (0.027) |
| ln_airport | (omitted) | 0.2855 (0.207) | 0.2081*** (0.060) |
| ln_oilprice | 0.0391 (0.038) | 0.0398 (0.039) | 0.0393 (0.051) |
| _cons | -187.8017*** (27.726) | -186.0983*** (27.966) | -191.7012*** (36.698) |
| R2 | 0.5170.1110.020 | 0.5040.7880.696 | 0.7167 |
| Hausman p-value | 0.000 | |
| obs | 1,656 | 1,656 | 1,656 |
주1: fe는 고정효과모형, re는 확률효과모형, ols는 다중회귀모형.
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.