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Table 3

2SLS Regression estimates of sample farmers

Variables	Coefficients	P > \|t\|
Dependent variable = Ln (net revenue per hectare)
Insurance (dummy; 0 = no; 1 = yes)	12.1729	0.003***
Labour (nos per hectare)	−0.2072	0.057*
Input expenditure (rands per hectare)	0.00001	0.010***
Rainfall (mm)	0.1034	0.044**
Rainfall²	−0.0001	0.019**
Minimum air temperature (°C)	−4.0081	0.135
Minimum air temperature²	0.1578	0.128
F test of endogeneity	7.4108 (P = 0.0071)
Wooldridge's Score test of overidentification of all instruments	P = 0.2992
Number of observations	235

Variables	Coefficients	P > \|t\|
Dependent variable = Ln (net revenue per hectare)
Insurance (dummy; 0 = no; 1 = yes)	12.1729	0.003***
Labour (nos per hectare)	−0.2072	0.057*
Input expenditure (rands per hectare)	0.00001	0.010***
Rainfall (mm)	0.1034	0.044**
Rainfall²	−0.0001	0.019**
Minimum air temperature (°C)	−4.0081	0.135
Minimum air temperature²	0.1578	0.128
F test of endogeneity	7.4108 (P = 0.0071)
Wooldridge's Score test of overidentification of all instruments	P = 0.2992
Number of observations	235

Notes: *significant at 10%; **significant at 5%; ***significant at 1%.