Utilization of Organic Fertilizer in Ghana: Implications for Crop Performance and Commercialization

Table 6

Estimates of the endogenous treatment effect model of the impact of OF on yield.

Variables	Yield		OF
	Coef.	Std. err.	Coef.	Std. err.
Farm size	−38.43	26.72
Worth	0.00	0.01	0.00	0.00
Chemical fertilizer	−0.29	0.25
Organic fertilizer	−0.22	0.22
Age			0.01	0.01
Extension serv.			0.04	0.06
FBO-M			0.509	0.22
OF affordability			0.10	0.22
1.OF (ATET)	1142.987	171.54
Constant	360.843	130.81	−0.79	0.40
/athrho	−1.30	0.239
/lnsigma	6.47	0.098
rho	−0.863	0.06
Sigma	646.93	63.17
Lambda	−558.01	86.49
Log likelihood	−820.28
Wald test χ^2 (19)	55.48
LR test of independent equations χ^2 (1) 8.7

Significant at 1% level of significance; significant at 5% significance level; significant at 10% significance level.