The Heckman model of dietary diversity score:
the case of Akaki Small-Scale Irrigation Scheme
Conference place: Desalegn Hotel, Addis Ababa,Ethiopia, January 14-16 2016By: Molla Deribie Friday, January 15, 2016 1
Content
• Introduction
• Objectives
• Methodology
• Result and Discussion
• Conclusion and Recommendation
• Acknowledgement
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Introduction
• Information on role of Akaki small scale irrigation scheme on
farming households dietary diversity;
• The way how this research has done and its finding,
generalizations and future course of actions;
• Small scale irrigation scheme as a means of household dietary
diversity;
• Agriculture as a means of a greater dietary diversity and
calorie availability (Emmanuel and Thomas, 2012);
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Objectives
• to evaluate impact of Akaki small scale irrigation scheme
on farm households’ dietary diversity score;
• to identify determinants of farm households’ dietary
diversity score and
• to forward actionable suggestion.
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Methodology
• Research design:
Causal;
• Sample size and sampling procedure:
With stratified random sampling technique;
= 246, irrigators (123) and non –irrigators (123)
• Data sources and collection method:
primary data on economic concepts with interview;
• Data analysis:
inferential statistics (Hechman model);
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Result and Discussion
Variables Heckman analysis Marginal effect
Coef. Std.err. z p>|z|
w 0.0040166 0.01152 0.35 0.727
fs -0.0012122 0.0058062 -0.21 0.835
sex 0.2694272 0.0383332 7.03 0.000
ls 0.0531168 0.0300659 1.77 0.077
ed 0.3915751 0.046395 8.44 0.000
offarmi 0.000366 0.0000816 4.48 0.000
dhomeland -0.0817047 0.038696 -2.11 0.035
onfarmi 7.95e-06 6.14e-06 1.29 0.195
Exp 0.0256571 0.0059585 4.31 0.000
nonfarmi 0.0000151 8.86e-06 1.70 0.089
cons -0.021203 0.00466486 -0.45 0.649
Dependant variable Households dietary diversity score
sex 1.49e-06 2630.316 0.00 1.000 0.2694272*
offarmi 6.28e-09 6.491465 0.00 1.000 0.000366*
dhomeland 3.64e-06 3331.409 0.00 1.000 -0.0817047*
onfarmi 3.85e-10 0.5292129 0.00 1.000 7.95e-06
exp 2.12e-07 451.9884 0.00 1.000 0.0000151
generator used 1.51e-05 1016.016 0.00 1.000 N/A
nonfarmi 6.56e-10 0.7577287 0.00 1.000 0.0256571
lambda -0.0003356 94.20654 0.00 1.000 N/A
cons 6.109908 1689.125 0.00 0.997 N/A
Dependant variable Household Irrigation participation
Number of observations 246
Log likelihood 263.5313
Wald chi2(10) 5020.43
Prob>chi2 0.0000
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Result and Discussion...
• at a 0.05 probability level,
lambda is insignificant; this implies Akaki small scale
irrigation scheme has no impact on HHDDS;
estimates of sex, ed, offarmi, dhomeland and exp. are
significant; this implies they are determinates of HHDDS;
estimates of sex, offarmi and dhomeland are significant;
this implies they are determinates of HHDDS.
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Conclusion and Recommendation
• Akaki small scale irrigation scheme has no impact on
households dietary diversity score;
• Sex, school year, off farm income, distance and irrigation
experience are determinates of dietary diversity score;
• Head of farming households should be male;
• Government should open farmers field school;
• farming households should share experience and create
means of off farm income source.
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Acknowledgement
• NFSRD
• OMMICS publishing group and
• Social Science Research Network
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Thank you!
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