Table 1 Estimated marginal impacts of Bt corn, humidity/drought, and temperature on aflatoxin-related insurance claims and indemnities.

Variables

(1)

(2)

(3)

Bt/stacked corn adoption rate (%)^b

−0.016***

—

−14.10***^a

(0.003)

—

(3.041)

Viptera corn adoption rate (%)

—

0.252

—

—

(0.163)

—

Non-Viptera Bt corn adoption rate (%)

—

−0.292**

—

—

(0.139)

—

Palmer Z index (index range −6.44 ~ 11.58)

Palmer Z in June

−0.044***

−0.129

−41.42***

(0.012)

(0.200)

(14.53)

Palmer Z in July

−0.041***

−0.997***

−44.32***

(0.011)

(0.292)

(11.24)

Palmer Z in August

0.006

−0.229

6.525

(0.008)

(0.211)

(7.479)

Palmer Z in September

0.020***

0.046

16.84**

(0.008)

(0.194)

(6.710)

Temperature in June (proportion of the temperature range, 0–1 value)

Range 30–40 °C

0.908***

5.761**

893.1***

(0.194)

(2.658)

(215.2)

Above 42 °C

−3.188

25.032

−3,576

(2.727)

(25.471)

(2,302)

Temperature in July (proportion of the temperature range, 0–1 value)

Range 30–40 °C

0.325**

10.206***

289.9**

(0.140)

(3.395)

(137.5)

Above 42 °C

−0.675

2.466

−602.9

(1.210)

(21.173)

(1,081)

Insurance

Insurance coverage (ratio with range 0 and 1)

—

—

2,047**

—

—

(797.1)

Insured area (hectare)

—

—

0.031***

—

—

(0.010)

State Effects Controlled

Yes

Yes

Yes

Year Effects Controlled

Yes

Yes

Yes

Observations

12,127

4,198

12,127