Table 1.

Descriptive statistics.

Variables	Mean	Median	Standard Deviation	Minimum Value	Maximum Value
$REI$	0.185	0.080	0.182	0.001	0.567
$REP$	1.653	0.782	2.341	0.001	12.944
$GDP$	11005.890	11409.400	6478.61	1907.334	26656.41
$PPI$	86.638	94.073	42.203	26656.41	197.473
$COE$	5.372	4.885	3.799	0.748	12.766

The figures are in original forms.