(b)

Fe

(B)

re

(b-B)

Difference

Sqrt(diag(V_b-V_B))

S.E.

Variable X₁ share of secondary sector

0.14564

1.90075

−1.75510

0.67509

Variable X₂ GDP per capita

−0.00081

−0.00046

−0.00035

0.00033

Variable X₃ population density

0.00599

0.00091

0.00508

0.00536

Variable X₄ year-end urban population

−0.50323

−0.00488

−0.49835

0.28468

Variable X₅ area of built-up area

0.1750

0.09535

0.07961

0.18271

Variable X₆ green coverage of built-up areas

−0.23415

−1.12971

0.89556

0.75510

b = Consistent under Ho and Ha; obtained from xteg;

B = Inconsistent under Ha, efficient under Ho; obtained from xtreg;

Test: Ho: difference in coefficients not systematic;

${\text{Chi}}^2\left(6\right)=\left(b-N\right)\text{'}\left[V\_b-V\_B^\left(-1\right)\right]\left(b-B\right)=11.72$

Prob > chi² = 0.0686;

(V_b-V_B is not positive definite).