Table 3 Coal: parameter estimates after...

Table 3

Coal: parameter estimates after variable selection

$\overset{̅}{x}$	$m$	$θ$	$β$	$α$	$ϑ_{D C}$
0.003*	0.041*	0.277**	0.102**	−0.133	0.309**
[0.024]	[0.104]	[1.018]	[0.401]	[0.706]	[0.242]

$ϑ_{S C}$	$ϕ_{11}$	$ϕ_{12}$	$ϕ_{21}$	$ϕ_{22}$
−0.227**	0.924**	2.270*	0.952**	1.069
[0.364]	[0.806]	[3.330]	[1.076]	[0.952]

Note(s): *and ** indicate significance at the 1% and 5% levels, respectively. Standard deviations are reported in square brackets

Source(s): Authors' own elaboration

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