Table 2.

Variable definitions.

Variable	Obs	Mean	Std. Dev.	Min	Max
AC	570	12,109.06	8,790.986	413.58	45,345.33
STU	570	71.91384	23.68239	0.38	97.66
IND	570	87.8303	6.492473	63.55	99.68
URB	570	50.50621	15.02015	23.2	89.6
INC	570	7,078.021	5,109.673	1,374.16	30,374.73
POS	570	118,622.7	71,148.22	4,987	281,181.4
ENG	570	38.97044	8.003126	23.78	62.68