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University of Ibadan, NIGERIA
Productivity Growth and Food Security:
The Case Of Maize-based Farming Households
in Nigeria
Ogheneruemu Obi-Egbedi
#2023 AGRODEP CONFERENCE
Outline
• Introduction
• Problem statement
• Research questions
• Motivation
• Material and methods
• Results
• Conclusion
Introduction
• Maize is the second most cultivated crop in the world . Global
production, harvested area and yield of 1.48 billion MT, 249.2 million
ha, and 5.1 t/ha, respectively (FAOSTAT, 2023).
• Most important cereal staple in Africa and Nigeria, for food security.
• Africa and Nigeria’s average yields stand at 2 t/ha and 1.6 t/ha,
respectively (FAOSTAT, 2023).
• Low maize productivity portends negative implications for the
country’s food security position.
Problem statement
• Plummeting food security remains a key public policy problem in
Nigeria.
• Ranks 103rd out of 116 nations and scores 28.3% with respect to
food quality, affordability and access (Global Food Security Index,
2021).
• Government programmes to improve food security and productivity
had little successes, with the poor results attributable to mis-
targeting of interventions and short-term rather than long term
nature (Sallawu et al., 2021; Aboaba et al., 2020).
• Empirical knowledge of maize productivity growth and its effect on
food security is required to properly direct policy.
Research questions
• What is the level of productivity and productivity growth among
maize-based farmers in Nigeria?
• What proportion of maize-based farmers transit from being
unproductive to productive over time in Nigeria?
• What are the determinants of productivity growth among maize-
based farmers in Nigeria?
• What is the level of food security among maize-based farming
households in Nigeria?
• What is the effect of productivity growth on food security among
maize-based farming households in Nigeria?
Motivation
• Most studies on Nigeria have dwelt on the determinants of
productivity (Ibitola et al., 2019; Ukoha et al, 2010).
• Mumba (2019) focused on productivity growth as the Total Factor
Productivity (TFP) change of maize smallholders in Southern Zambia.
• The link between productivity growth and food security is limited
despite abundance of studies on food security determinants
(Ogunniyi et al., 2021; Olufemi and Oladele, 2021; Ojoko et al., 2021;
Opaluwa et al., 2018; Sekhampu, 2013).
• This knowledge will help to design appropriate public policies to
address the issues of poor productivity growth and food insecurity.
#2023 AGRODEP CONFERENCE
Materials
and
methods
Study area, data type and source
• Nigeria is the study area
• Secondary data sourced from Nigeria’s General Household Survey
(GHS) for 2015/2016 and 2018/2019 were used.
• A sample of 572 maize-based farming households was extracted that
produced complete information in both waves.
• The data were analysed using
-descriptive statistics -Total Factor Productivity (TFP)
-Markov chain model -Food security measures of Foster–Greer-
Thorbecke (FGT) -Tobit and logit regression models.
#2023 AGRODEP CONFERENCE
Results
and
Discussion
Total factor productivity of maize-based farmers in Nigeria
Total Factor Productivity Frequency Percent Mean SD
(n=572)
2015/16
No productivity (<1) 360 62.94 0.696 0.494
Low productivity (1.00-2.00) 206 36.01
High productivity (>2.00) 6 1.05
2018/19
No productivity (<1) 399 69.76
Low productivity (1.00-2.00) 89 15.56 1.015 1.682
High productivity (>2.00) 84 14.68
Total 572 100.00
Total factor productivity growth between 2015/16 and
2018/19 among maize-based farmers in Nigeria
Productivity growth Frequency Percent
age
Mean Standard
deviation
Negative and No
growth (≤0.00)
334 58.39 0.8659 1.681818
Low growth (>0.00–
≤1.00)
86 15.04
High growth (>1.00) 152 26.57
Total 572 100.0
Markov probability transition matrix of total factor productivity
2018/19
No
productivity
Low
productivity
High
productivity
Total
2015/16
No productivity 244
(0.6777)
57 (0.1583) 59 (0.1639) 360
(0.6294)
Low
productivity 152
(0.7379)
32 (0.1553) 22 (0.1068) 206
(0.3601)
High
productivity 3 (0.5000) 0 (0.0000) 3 (0.5000) 6 (0.0105)
Total
399
(0.6976)
89 (0.1556) 84 (0,1469) 572
Tobit regression estimates for determinants of
productivity growth among maize-based farmers
Variable Coefficient Std. Error t-value
Age -0.0077** -0.0034 2.26 0.024
Sex 0.4618* 0.2398 1.93 0.055
Marital Status -0.1261 0.2106 -0.60 0.549
Education (formal) -0.1467 0.1297 -1.13 0.258
Household Size 0.0018 0.0116 0.16 0.876
Farm income -0.1296 0.0849 -1.53 0.127
Farm size (ha) 0.2105*** 0.0336 6.27 0.000
Access to credit -0.0270 0.1303 -0.21 0.836
Membership of cooperative -0.3213*** 0.1016 -3.16 0.002
Sector (rural) -0.5498*** 0.1898 -2.90 0.004
Constant 1.9682 1.0143 1.94 0.053
Number of obs = 572
LR chi2(10) = 92.67
Prob > chi2 = 0.0000
Pseudo R2 = 0.0603
Adjusted R2 = 0.0482
Food insecurity indices of maize-based farming
households from 2015/16 to 2018/19
Food
insecurity
incidence
Food
insecurity
depth
Food
insecurity
severity
Food insecurity
line (two-thirds of
MPCHFE) ₦
Mean per capita
household food
expenditure
(MPCHFE) ₦
2015/16
0.4266 0.1546 0.0772 3843.01 5764.52
2018/19
0.520979 0.22547 0.134381 3669.96 5504.94
Logit regression estimates for the effects of productivity growth on food security among
maize-based farmers
Variable Coefficient Std. Error Z P>|z| dy/dx
Productivity growth sq 0.0007* 0.0004 1.91 0.057 0.0001
Sex 0.4736 1.2961 0.37 0.715 0.0829
Age sq -0.0001 0.0002 -0.40 0.689 -0.0004
Marital status 1.8572* 1.0133 1.83 0.067 0.3250
Household size 0.1358*** 0.0468 2.90 0.004 0.0238
Farm size (ha) -0.0978 0.1099 -0.89 0.374 -0.0171
Primary educational level -0.2729 0.5187 -0.53 0.599 -0.0455
Secondary educational level 0.9786* 0.5119 1.91 0.056 0.1763
Tertiary educational level 2.4287*** 0.6618 3.67 0.000 0.4086
Access to credit -1.0368* 0.6202 -1.67 0.095 -0.1815
Sector 0.8681 0.6687 1.30 0.194 0.1453
Constant -5.4885 1.3962 -3.93 0.000
Number of obs = 238
LR chi2 (16) = 80.71
Prob > chi2 = 0.0000
Pseudo R2 = 0.2452
Conclusion
• Productivity growth was low between 2015/16 and 2018/19
• Most maize-based farmers either remained unproductive in both
periods or transited from being productive to unproductive.
• Age, membership of cooperatives and living in the rural area impeded
farmers’ productivity growth, whereas being male and farm size
improved it.
• Food security levels worsened between 2015/16 and 2018/19.
• Productivity growth, household size, secondary and tertiary
educational levels improve food security.
#2023 AGRODEP CONFERENCE
Policy recommendations
• Food security interventions by the government should include a
long-term plan to improve productivity growth of farmers in
Nigeria.
• Education interventions for farmers should go beyond the basic
level, which is the current drive of the Nigeria government.
• Government should investments in the rural areas to improve
the production environment for the farmers
THANK YOU

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Ogheneruemu Obi-Egbedi_2023 AGRODEP Annual Conference

  • 1. University of Ibadan, NIGERIA Productivity Growth and Food Security: The Case Of Maize-based Farming Households in Nigeria Ogheneruemu Obi-Egbedi
  • 2. #2023 AGRODEP CONFERENCE Outline • Introduction • Problem statement • Research questions • Motivation • Material and methods • Results • Conclusion
  • 3. Introduction • Maize is the second most cultivated crop in the world . Global production, harvested area and yield of 1.48 billion MT, 249.2 million ha, and 5.1 t/ha, respectively (FAOSTAT, 2023). • Most important cereal staple in Africa and Nigeria, for food security. • Africa and Nigeria’s average yields stand at 2 t/ha and 1.6 t/ha, respectively (FAOSTAT, 2023). • Low maize productivity portends negative implications for the country’s food security position.
  • 4. Problem statement • Plummeting food security remains a key public policy problem in Nigeria. • Ranks 103rd out of 116 nations and scores 28.3% with respect to food quality, affordability and access (Global Food Security Index, 2021). • Government programmes to improve food security and productivity had little successes, with the poor results attributable to mis- targeting of interventions and short-term rather than long term nature (Sallawu et al., 2021; Aboaba et al., 2020). • Empirical knowledge of maize productivity growth and its effect on food security is required to properly direct policy.
  • 5. Research questions • What is the level of productivity and productivity growth among maize-based farmers in Nigeria? • What proportion of maize-based farmers transit from being unproductive to productive over time in Nigeria? • What are the determinants of productivity growth among maize- based farmers in Nigeria? • What is the level of food security among maize-based farming households in Nigeria? • What is the effect of productivity growth on food security among maize-based farming households in Nigeria?
  • 6. Motivation • Most studies on Nigeria have dwelt on the determinants of productivity (Ibitola et al., 2019; Ukoha et al, 2010). • Mumba (2019) focused on productivity growth as the Total Factor Productivity (TFP) change of maize smallholders in Southern Zambia. • The link between productivity growth and food security is limited despite abundance of studies on food security determinants (Ogunniyi et al., 2021; Olufemi and Oladele, 2021; Ojoko et al., 2021; Opaluwa et al., 2018; Sekhampu, 2013). • This knowledge will help to design appropriate public policies to address the issues of poor productivity growth and food insecurity.
  • 8. Study area, data type and source • Nigeria is the study area • Secondary data sourced from Nigeria’s General Household Survey (GHS) for 2015/2016 and 2018/2019 were used. • A sample of 572 maize-based farming households was extracted that produced complete information in both waves. • The data were analysed using -descriptive statistics -Total Factor Productivity (TFP) -Markov chain model -Food security measures of Foster–Greer- Thorbecke (FGT) -Tobit and logit regression models.
  • 10. Total factor productivity of maize-based farmers in Nigeria Total Factor Productivity Frequency Percent Mean SD (n=572) 2015/16 No productivity (<1) 360 62.94 0.696 0.494 Low productivity (1.00-2.00) 206 36.01 High productivity (>2.00) 6 1.05 2018/19 No productivity (<1) 399 69.76 Low productivity (1.00-2.00) 89 15.56 1.015 1.682 High productivity (>2.00) 84 14.68 Total 572 100.00
  • 11. Total factor productivity growth between 2015/16 and 2018/19 among maize-based farmers in Nigeria Productivity growth Frequency Percent age Mean Standard deviation Negative and No growth (≤0.00) 334 58.39 0.8659 1.681818 Low growth (>0.00– ≤1.00) 86 15.04 High growth (>1.00) 152 26.57 Total 572 100.0
  • 12. Markov probability transition matrix of total factor productivity 2018/19 No productivity Low productivity High productivity Total 2015/16 No productivity 244 (0.6777) 57 (0.1583) 59 (0.1639) 360 (0.6294) Low productivity 152 (0.7379) 32 (0.1553) 22 (0.1068) 206 (0.3601) High productivity 3 (0.5000) 0 (0.0000) 3 (0.5000) 6 (0.0105) Total 399 (0.6976) 89 (0.1556) 84 (0,1469) 572
  • 13. Tobit regression estimates for determinants of productivity growth among maize-based farmers Variable Coefficient Std. Error t-value Age -0.0077** -0.0034 2.26 0.024 Sex 0.4618* 0.2398 1.93 0.055 Marital Status -0.1261 0.2106 -0.60 0.549 Education (formal) -0.1467 0.1297 -1.13 0.258 Household Size 0.0018 0.0116 0.16 0.876 Farm income -0.1296 0.0849 -1.53 0.127 Farm size (ha) 0.2105*** 0.0336 6.27 0.000 Access to credit -0.0270 0.1303 -0.21 0.836 Membership of cooperative -0.3213*** 0.1016 -3.16 0.002 Sector (rural) -0.5498*** 0.1898 -2.90 0.004 Constant 1.9682 1.0143 1.94 0.053 Number of obs = 572 LR chi2(10) = 92.67 Prob > chi2 = 0.0000 Pseudo R2 = 0.0603 Adjusted R2 = 0.0482
  • 14. Food insecurity indices of maize-based farming households from 2015/16 to 2018/19 Food insecurity incidence Food insecurity depth Food insecurity severity Food insecurity line (two-thirds of MPCHFE) ₦ Mean per capita household food expenditure (MPCHFE) ₦ 2015/16 0.4266 0.1546 0.0772 3843.01 5764.52 2018/19 0.520979 0.22547 0.134381 3669.96 5504.94
  • 15. Logit regression estimates for the effects of productivity growth on food security among maize-based farmers Variable Coefficient Std. Error Z P>|z| dy/dx Productivity growth sq 0.0007* 0.0004 1.91 0.057 0.0001 Sex 0.4736 1.2961 0.37 0.715 0.0829 Age sq -0.0001 0.0002 -0.40 0.689 -0.0004 Marital status 1.8572* 1.0133 1.83 0.067 0.3250 Household size 0.1358*** 0.0468 2.90 0.004 0.0238 Farm size (ha) -0.0978 0.1099 -0.89 0.374 -0.0171 Primary educational level -0.2729 0.5187 -0.53 0.599 -0.0455 Secondary educational level 0.9786* 0.5119 1.91 0.056 0.1763 Tertiary educational level 2.4287*** 0.6618 3.67 0.000 0.4086 Access to credit -1.0368* 0.6202 -1.67 0.095 -0.1815 Sector 0.8681 0.6687 1.30 0.194 0.1453 Constant -5.4885 1.3962 -3.93 0.000 Number of obs = 238 LR chi2 (16) = 80.71 Prob > chi2 = 0.0000 Pseudo R2 = 0.2452
  • 16. Conclusion • Productivity growth was low between 2015/16 and 2018/19 • Most maize-based farmers either remained unproductive in both periods or transited from being productive to unproductive. • Age, membership of cooperatives and living in the rural area impeded farmers’ productivity growth, whereas being male and farm size improved it. • Food security levels worsened between 2015/16 and 2018/19. • Productivity growth, household size, secondary and tertiary educational levels improve food security.
  • 17. #2023 AGRODEP CONFERENCE Policy recommendations • Food security interventions by the government should include a long-term plan to improve productivity growth of farmers in Nigeria. • Education interventions for farmers should go beyond the basic level, which is the current drive of the Nigeria government. • Government should investments in the rural areas to improve the production environment for the farmers