Table 7 Air quality, donations, and...

Table 7

Air quality, donations, and volunteers: Interactions with industry sub-sector (NTEE codes)

	DV =
	Donations (1)		Volunteers (2)
Hazardous Days_t	−0.004**	(−3.988)	0.002	(0.336)
AR (Arts)	0.019**	(28.705)	0.456**	(66.000)
EN (Environment)	0.070**	(82.072)	0.742**	(82.947)
HE (Health)	0.022**	(37.858)	−0.012**	(−1.985)
HU (Human Services)	−0.011**	(−22.128)	0.167**	(33.056)
IN (International)	0.165**	(146.330)	0.058**	(4.933)
MU (Mutual Benefit)	−0.026**	(−8.517)	−0.299**	(−9.353)
PU (Public/Societal Benefit)	0.037**	(61.065)	0.101**	(15.692)
RE (Religious)	0.091**	(114.176)	−0.047**	(−5.659)
UN (Unknown)	0.025**	(8.489)	0.157**	(5.028)
Hazardous Days × AR	−0.0002	(−0.155)	0.060**	(3.972)
Hazardous Days × EN	0.004**	(2.816)	0.006	(0.421)
Hazardous Days × HE	0.003*	(2.063)	−0.010	(−0.749)
Hazardous Days × HU	0.004**	(3.907)	−0.008	(−0.705)
Hazardous Days × IN	0.001	(0.276)	−0.045	(−1.506)
Hazardous Days × MU	0.0001	(0.016)	0.129⁺	(1.781)
Hazardous Days × PU	−0.001	(0.724)	0.016	(1.058)
Hazardous Days × RE	0.004*	(1.999)	0.021	(1.072)
Hazardous Days × UN	0.004	(0.743)	0.037	(0.721)
Control Variables	YES		YES
State and Year Fixed Effects	YES		YES
Observations	1,633,529		1,633,529
Adjusted R²	0.838		0.222
F	90182.653^**		4969.970^**

	DV =
	Donations (1)		Volunteers (2)
Hazardous Days_t	−0.004**	(−3.988)	0.002	(0.336)
AR (Arts)	0.019**	(28.705)	0.456**	(66.000)
EN (Environment)	0.070**	(82.072)	0.742**	(82.947)
HE (Health)	0.022**	(37.858)	−0.012**	(−1.985)
HU (Human Services)	−0.011**	(−22.128)	0.167**	(33.056)
IN (International)	0.165**	(146.330)	0.058**	(4.933)
MU (Mutual Benefit)	−0.026**	(−8.517)	−0.299**	(−9.353)
PU (Public/Societal Benefit)	0.037**	(61.065)	0.101**	(15.692)
RE (Religious)	0.091**	(114.176)	−0.047**	(−5.659)
UN (Unknown)	0.025**	(8.489)	0.157**	(5.028)
Hazardous Days × AR	−0.0002	(−0.155)	0.060**	(3.972)
Hazardous Days × EN	0.004**	(2.816)	0.006	(0.421)
Hazardous Days × HE	0.003*	(2.063)	−0.010	(−0.749)
Hazardous Days × HU	0.004**	(3.907)	−0.008	(−0.705)
Hazardous Days × IN	0.001	(0.276)	−0.045	(−1.506)
Hazardous Days × MU	0.0001	(0.016)	0.129⁺	(1.781)
Hazardous Days × PU	−0.001	(0.724)	0.016	(1.058)
Hazardous Days × RE	0.004*	(1.999)	0.021	(1.072)
Hazardous Days × UN	0.004	(0.743)	0.037	(0.721)
Control Variables	YES		YES
State and Year Fixed Effects	YES		YES
Observations	1,633,529		1,633,529
Adjusted R²	0.838		0.222
F	90182.653^**		4969.970^**

Note(s): Table shows coefficients from robust regressions, with t-stats in parentheses; + p < 0.10, *p < 0.05, **p < 0.01 (two-tailed). Robust regressions eliminate gross outliers (i.e. where Cook's distance >1), and automatically down-weights outliers and influential observations in the estimation process, providing more reliable coefficient estimates than OLS when data contain extreme values or influential cases. The omitted (baseline) category is Education organizations (NTEE category ED). See Appendix for variable definitions

Source(s): Authors' own creation

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