DiD Coefficients and Joint Wald Test
	β̂	SE	t	p	χ²	df
Post t+2	−168.53	76.39	−2.21	0.030	NA	NA
Post t+3	−191.10	76.33	−2.50	0.014	NA	NA
Joint (t+2 & t+3)	NA	NA	NA	0.020	7.78	2