Variable	Overhead cost ratio	Net interest margin
SND ratio (t − 1)	−0.086^**	−0.061^*
SND ratio (t − 1)	(−3.140)	(−2.325)
Overhead-cost ratio (t − 1)	0.892^**
Overhead-cost ratio (t − 1)	(26.800)
Net interest margin (t − 1)		0.879^**
Net interest margin (t − 1)		(30.446)
NPL ratio (t − 1)	−0.019	0.038
NPL ratio (t − 1)	(−0.449)	(1.214)
Capital ratio (t − 1)	0.046^**	0.049^**
Capital ratio (t − 1)	(3.907)	(3.847)
Observations	870	1208
F test (p-value)	0.000	0.000
Hansen test (p-value)	0.549	0.335
Serial correlation test (p-value)	0.664	0.287