Table 1.

Descriptive statistics of real world payment population.

Stratum	Mean	Std. dev.	Median	$N_h$
h = 1	69.40	46.92	40.00	3949
h = 2	915.69	180.87	70.00	1402
h = 3	2335.37	244.61	2500.00	588
h = 4	3076.60	206.76	3000.00	1675
h = 5	4012.65	246.71	4100.00	664
Overall	1298.47	1441.22	600.00	N = 8278