. 2019 Jun 25;16(12):2245. doi: 10.3390/ijerph16122245

Table 1.

Classification of heat wave (HW) days, risk assignments, and definition of Difference-in-Differences.

	Temperature Monitoring Data		Change
	Heat Wave Days	Non-Heat Wave Days	Change
HW alert +	E[Y¹(1)]	E[Y⁰(1)]	E[Y¹(1) − Y⁰(1))
HW alert −	E[Y¹(0)]	E[Y⁰(0)]	E[Y¹(0) − Y⁰(0)]
Difference	E[Y¹(1) − Y¹(0)]	E[Y⁰(1) − Y⁰(0)]	Δ= E[Y¹(1) − Y¹(0)] − E[Y⁰(1)−Y⁰(0)]