Table 3.

Estimates from non-linear models

	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
	Quadratic						Binary			Semi-parametric
WBT	808.544***	410.148***	838.167***	871.742***	1031.185***	976.773***
	(123.181)	(126.537)	(123.641)	(124.821)	(131.367)	(129.026)
WBT${}^2$	$-$17.097***	$-$9.124***	$-$17.654***	$-$18.304***	$-$22.049***	$-$21.006
	(2.418)	(2.500)	(2.429)	(2.454)	(2.603)	(2.551)
Precipitation					$-$5.556***	$-$5.798***
					(1.156)	(1.154)
Cloud cover					$-$1.756	$-$1.715
					(1.167)	(1.150)
Sunshine duration					0.195	0.183
					(0.156)	(0.156)
Wind gust					$-$18.833***	$-$19.658***
					(5.584)	(5.423)
Wind speed					18.034***	20.679***
					(7.789)	(7.652)
WBT > 24							$-$202.452***
							(43.268)
WBT > 26								$-$213.827***
								(45.753)
WBT > 28									$-$547.701***
									(52.815)
Turning point	23.6 ${}^{\circ }$C	22.5 ${}^{\circ }$C	23.7 ${}^{\circ }$C	23.8 ${}^{\circ }$C	23.4 ${}^{\circ }$C	23.3 ${}^{\circ }$C
	[22.9 ${}^{\circ }$C, 24.4 ${}^{\circ }$C]	[20.6 ${}^{\circ }$C, 24.3 ${}^{\circ }$C]	[23.1 ${}^{\circ }$C, 24.4 ${}^{\circ }$C]	[23.2 ${}^{\circ }$C, 24.4 ${}^{\circ }$C]	[22.8 ${}^{\circ }$C, 24.0 ${}^{\circ }$C]	[22.6 ${}^{\circ }$C, 23.9 ${}^{\circ }$C]
$21<\text{WBT}\le 24$										119.190
										(107.797)
$24<\text{WBT}\le 27$										$-$21.735
										(108.668)
$27<\text{WBT}\le 30$										$-$321.318***
										(113.384)
$30<\text{WBT}$										$-$478.572***
										(156.643)
Observations	35,190	35,190	35,190	35,190	35,190	35,190	35,190	35,190	35,190
Number of works	635	635	635	635	635	635	635	635	635	635
Worker FE	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Year FE	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Month FE	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Week FE	No	Yes	No	No	No	No	No	No	No	No
Day of Week	No	No	Yes	Yes	Yes	No	No	No	No	No
Building FE	No	No	No	Yes	Yes	No	No	No	No	No
Other weather	No	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes

The dependent variable in all regressions is output per worker-shift. WBT refers to the maximum wet bulb temperature on day of shift. Robust standard errors clustered at the worker level are presented in parentheses, and ***$p<0.01$, **$p<0.05$, *$p<0.1$. 95% confidence intervals of the turning point of the quadratic relationship between wet bulb temperature and output are presented in square brackets. The sample comprises all day shifts from May to September