Agricultural and Food Economics

Table 2 Comparison of coefficients obtained from three stages

From: Factors affecting efficiency of cotton producers in rural Khorezm, Uzbekistan: Re-examining the role of knowledge indicators in technical efficiency improvement

		1^stStep			2^ndStep			3^rdStep
		MLE Coeff.	SE		MDE Coeff.	Diff.	Diff/SE	Adj. Coeff.
Constant	β₀	2.443	0.306	***	2.257	−0.186	−0.609	2.246
Ln (Diesel)	β₁	0.565	0.216	***	0.527	−0.038	−0.127	0.522
Ln (Labour)	β₂	0.281	0.109	**	0.192	−0.089	−0.295	0.190
Ln (Nitrogen)	β₃	0.834	0.290	***	0.606	−0.228	−0.753	0.600
Ln(Diesel)*Ln(Diesel)	β₁₁	0.157	0.104	NS	0.138	−0.018	−0.060	0.137
Ln(Diesel)*Ln(Labour)	β₁₂	0.056	0.034	*	0.035	−0.021	−0.070	0.034
Ln(Diesel)*Ln(Nitrogen)	β₁₃	0.125	0.066	*	0.107	−0.017	−0.057	0.106
Ln(Labour)*Ln(Labour)	β₂₂	−0.089	0.048	*	−0.055	0.034	0.111	−0.054
Ln(Labour)*Ln(Nitrogen)	β₂₃	0.038	0.046	NS	0.020	−0.018	−0.059	0.020
Ln(Nitrogen)*Ln(Nitrogen)	β₃₃	0.300	0.171	*	0.173	−0.126	−0.417	0.172

Note:***, **, *indicates significance at the 1, 5 and 10% levels, respectively.

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