Table 9 Coefficient estimates
From: Forecasting CO2 emissions in BRICS countries using the grey breakpoint prediction models
Model | Coefficient estimates |
|---|---|
GM | a = 0.0003, b = 503.0479 |
FGM | r = 1, a = 0.0003, b = 503.0479 |
GBPM | t = 6, a = 0.0075, b = 513.7434, c = 18.8120 |
OGBPM | t = 6, a = 0.0075, b = 513.7434, c = − 15.5447, ε = − 0.0085 |
NOGBPM | t = 8, a = 0.0048, b = 510.0705; c = 11.3591, ε = − 0.0007, α = 0.3168, β = 0 |
NGBPM | t = 6, a = 0.0040; b = 503.2481; c = − 1.2596; α = 1; β = 0.3449 |
AGBPM | t = 6, a = 0.0040; b = 508.1228; ε = − 0.0025; α = 0.7880; β = 0.0885 |