Food Security Commons^™

Spatial Analysis Of Maize Yields And Household Dietary Diversity In Sub-Saharan Africa: Causal Evidence From A Machine Learning Instrument, Addi Joof

Master's Theses

MAIZE YIELDS AND HOUSEHOLD DIETARY DIVERSITY IN SUB-SAHARAN AFRICA: EVIDENCE ON THE CAUSAL EFFECT FROM A MACHINE LEARNING INSTRUMENT

Addi Joof, University of San Francisco, May 2026

This paper provides estimates of the effect of maize yield on household dietary diversity across seven Sub-Saharan African countries, using data from 36,474 maize-growing households in the Living Standards Measurement Study Integrated Surveys on Agriculture (LSMS-ISA) panels for the period 2008--2021. OLS estimates which include district and country-by-wave fixed effects yield a positive and significant coefficient of 0.070 (SE = 0.006, p < 0.001), implying that a 10 percent increase in maize yield raises the Household Dietary Diversity Score (HDDS) by approximately 0.007 food groups. Because self-reported yields are subject to classical measurement error and unobserved household characteristics confound the OLS estimate, we construct an instrumental variable using a Random Forest model trained on satellite-derived agro-environmental features including the Enhanced Vegetation Index, Normalized Difference Vegetation Index, Growing Degree Days, precipitation, and soil moisture obtained from Google Earth Engine at the GPS-coordinate-by-year level. Our preferred 2SLS specification, which adds region fixed effects to absorb persistent sub-national geographic variation, returns a positive point estimate of 0.217 (SE = 0.206; 95% CI: -0.19 to +0.63, p = 0.294) larger than OLS and consistent with downward attenuation bias, but imprecisely estimated and statistically indistinguishable from zero at conventional levels. We interpret the OLS estimate of 0.070 as a credible lower bound on the true effect, with the IV evidence pointing to a moderately larger but uncertain magnitude. Heterogeneity analysis reveals a declining gradient across consumption quintiles the effect is strongest among the poorest households (Q1: 0.055, p < 0.01) and diminishes with wealth (Q5: 0.015, not significant) while showing no gradient across market-integration levels. These patterns are consistent with own-consumption, rather than market income from surplus sales, as the primary pathway from yield to dietary diversity. OLS estimates are positive and significant in five of six estimable countries. The findings suggest that maize yield improvements can serve as a nutrition co-investment, particularly for subsistence-oriented smallholders, though the available data do not permit a sharp causal quantification of the effect size.

Keywords: dietary diversity, maize yields, instrumental variables, Sub-Saharan Africa, LSMS-ISA, satellite …

Farmers Markets As Community Infrastructure: Evidence From A Three-Year Statewide Data Project In Utah, Jaclyn Pace, Roslynn Mccann, Blue Cook, Steven Price, Lorali Smith, Dianna Parkynn, Joshua Cafferty

Outcomes and Impact Quarterly

Utah farmers markets play a critical role in food access, small business viability, and community connection, yet limited statewide data document their impact. The Utah Farmers Market Network (UFMN) and Utah State University (USU) Extension conducted a mixed-methods evaluation (2023–2025) and found that farmers markets make valuable contributions to the community.

Kemiskinan Multidimensi Dan Ketahanan Pangan: Analisis Multilevel Di Kalimantan, Lina Agustina Pujiwati, Afriyanni Afriyanni, Dewi Harfina, Zainal Fatoni

Jurnal Ekonomi Kependudukan dan Keluarga

Food security is a crucial issue for sustainable development and is highly influenced by multidimensional poverty. This study measures food security and multidimensional poverty in Kalimantan Island, analyzes the determinants of household food security through a multilevel approach, and explores the influence of multidimensional poverty and regional context on food security. Data were obtained from the March 2022 National Socio-Economic Survey, comprising 33,201 households and integrated with district-level characteristics. Multidimensional poverty was measured using the Alkire-Foster method, while food security was measured based on energy consumption and the proportion of food expenditure. A multilevel ordinal logistic regression was employed to …

Gardens Through The Ages: How Public Gardens Impact The Growth Of Society, Abby J. Cutsinger

ATU Scholars Symposium

Throughout history, gardens held a vital role in the development of civilizations, often serving as spaces for food, reflection, and community. The aim of this study was to explore the progression of gardens parallel to Maslow’s hierarchy of needs. Additionally, the study aimed to determine whether gardens help fulfill those needs and, in doing so, influence human morality. To examine these possibilities, the researcher conducted a literature review of historical and contemporary accounts of gardening and its effects on physical and psychological well-being, analyzing these findings through the lens of Maslow’s framework. Additionally, crime rate data were compared across several …

Impact Of Community Gardening On Neighborhood Crime Rates: Research Proposal, Abby J. Cutsinger

ATU Scholars Symposium

Gardening has been a part of human existence from the beginning of time, but people have become distanced from gardening as civilization has grown and urbanized. As this distance has grown, so has the disconnect between people and the basic needs which shape their views of themselves and of society. It is possible that, in the drift away from gardening as communities, humans have become less moral.

The purpose of this study is to determine if community gardening lowers violent crime rates.

This relationship will be gauged by answering the following questions:

• Which type of community gardening benefits community relationships …

The Role Of Affordable Housing In Enhancing Tenants' Economic Stability In Connecticut: A Focus On Income, Employment, And Housing Stability, Osaid Zubi

Dissertations

This study examined the role of affordable housing in promoting economic stability among low- and moderate-income households in Connecticut. Focusing on income security, employment opportunities, and housing retention, this research highlighted the significance of affordable housing as a means to alleviate financial strain, support job retention, and foster community resilience. Utilizing a phenomenological approach, the study gathered insights from tenants, policymakers, and developers through conducting interviews and a focus group. Connecticut was chosen as the study site due to its high cost of living and affordable housing shortage, exacerbated by its proximity to New York City. Findings underscore the economic …

Stock Market Volatility In The United Kingdom: Simulating Post-Covid-19 Recovery, Bala A. Dahiru, Mohammed Shuaibu, Najibullah Hassanov

CBN Journal of Applied Statistics (JAS)

This paper investigates the time it would take for the FTSE-100 index to reach its post-COVID-19 peak. The paper utilises an exponential generalised autoregressive conditional heteroscedasticity (EGARCH) model that accounts for leverage effect and asymmetries. The preferred models amongst competing variants was the Autoregressive Moving Average (ARMA)-EGARCH(2,1) specification and was used to predict daily FTSE-100 data from 5th January 2000 to 21st June 2024. The empirical exercise showed that the COVID-19-induced financial crisis negatively affected the United Kingdom’s stock market performance. The results show that the FTSE100 index could reach its post-pandemic peak around 27th August, 2024 (two months after …

Health And Healthcare: Designing For The Social Determinants Of Health And Blue Zones In North Nashville, Rebecca Tonguis, Honor Thomas, Olivia Hobbs

[Archive] Belmont University Research Symposium (BURS)

Owned by North Nashville’s First Community Church, a now empty site in the Osage-North Fisk neighborhood of North Nashville has been identified as a potential site for a new location of The Store, in addition to a community-centric architectural development based on the social determinants of health and informed by the principles behind Blue Zones, the locations with the highest lifespans in the world. Opened by Brad Paisley and Kimberly Williams-Paisley, The Store is a free grocery store that “allow[s] people to shop for their basic needs in a way that protects dignity and fosters hope”, for which North Nashville …

Reducing Food Scarcity: The Benefits Of Urban Farming, S.A. Claudell, Emilio Mejia

Journal of Nonprofit Innovation

Urban farming can enhance the lives of communities and help reduce food scarcity. This paper presents a conceptual prototype of an efficient urban farming community that can be scaled for a single apartment building or an entire community across all global geoeconomics regions, including densely populated cities and rural, developing towns and communities. When deployed in coordination with smart crop choices, local farm support, and efficient transportation then the result isn’t just sustainability, but also increasing fresh produce accessibility, optimizing nutritional value, eliminating the use of ‘forever chemicals’, reducing transportation costs, and fostering global environmental benefits.

Imagine Doris, who is …

Modelling The Naira Exchange Rate Dependence Using Static And Time-Varying Copula, Kabir Katata

CBN Journal of Applied Statistics (JAS)

This paper examines the dependence structure of different currencies versus the Nigerian Naira using constant and time-varying copula. Daily Naira/USD, Naira/Yuan, Naira/Pound, and Naira/Euro exchange rates from 23 December 2011 to 12 May 2020 were utilised. We fitted eight constant and time-varying copula families using the exchange rate standardised residuals. The study finds that the Naira exchange rate may be estimated with student t-copula, Symmetrized Joe-Clayton (SJC), or Rotated Gumbel copula models and Autoregressive (AR)– Glosten Jagannathan RunkleGeneralized Autoregressive Conditional Heteroscedastic (GJR-GARCH) (1,1) models with skewed t residuals for margins. The Naira exchange rate returns is timevarying, tail-dependent, and asymmetric. …

The Effect Of Financial Inclusion On Food Security: Evidence From Developing And Developed Countries, Yasmin Yasmin, Sekar Utami Setiastuti

Economics and Finance in Indonesia

This study investigates the global impact of financial inclusion on food security, with a focus on both developing and developed countries. The study constructs a financial inclusion index using the Sarma method and secondary data sourced from IMF and World Bank databases. System GMM is employed as the estimation method due to its effectiveness in addressing endogeneity issues and its efficient and consistent use of instruments. The analysis reveals that financial inclusion has a positive and statistically significant effect on food security across all research sub-samples. In addition, the study incorporates interaction variables between financial inclusion and the COVID-19 pandemic …

Two Essays In Agriculture Trade And Food Security: 1. Decomposing The Impact Of Gmo Regulation On Bilateral Trade: An Application To Corn Trade; 2. Can Food-Security Policies In Tunisia Be Better Targeted?, Mohamed Amine Hedoui

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

This dissertation is composed of two essays on agricultural trade and food security. The first chapter is entitled “Decomposing the GMO regulation impact on bilateral trade.” The essay analyses the complex impact of GMO regulations among countries on bilateral trade with a focus on GMO approvals. Three effects impact bilateral trade flows between trade partners: productivity enhancements in the source country, sorting cost from bilateral dissimilarity in regulations, and stringency impact on import demand. We estimate the model using a panel dataset of corn trade and two econometric approaches (PPML, Heckman sample-selection). We find that GMO laxity in production of …

Adoption Of Ict To Support Rural Small-Holder Farmers : A Systematic Review, Abdus Salaam Seat, Shaun Pather

African Conference on Information Systems and Technology

Access to Information and Communication Technologies (ICTs) are slowly becoming more available to rural communities given a number of innovative approaches over recent years such as the implementation of Community Networks (CNs). Consequently, ICTs are able to become more meaningful in support of livelihoods of these communities, such as in agriculture production. Potential benefits to smallholder farmers include increase yields and reduced effort. However, there is very little evidence of smallholder farmers integrating ICTs into their livelihood activity. In this paper a Systematic Literature Review is used to explore the challenges faced in this sector. A total of 83 articles …

Food Price And Inflation Adjustments In Nigeria: Evidence From Threshold Cointegration, Usman A. Bello, Aliyu R. Sanusi

CBN Journal of Applied Statistics (JAS)

This paper investigates two stages of transmission through which inflation stabilization policy affects headline inflation by estimating a threshold cointegration model. The paper finds that asymmetric monetary shocks passing-through food prices exerts inflationary pressure on consumer prices, and is characterized by deep asymmetric movement, large degree of stickiness in adjusting downward, while exhibiting upward momentum in correcting food price fall. In addition, asymmetries were found in consumer price adjustment as food price shock transmits substantial inflationary pressure to consumer prices, while disinflationary effect originating from a fall in food price is inconsequential. The coefficients of adjustment were found to be …

Modelling The Impact Of Government Expenditure On Economic Growth In Nigeria: The Moderating Effects Of Oil And Non-Oil Revenue, Victor U. Ijirshar, Gaius M. Asombo, Florence D. Bundepuun, Ashifa Tersugh, Ayila Ngutsav

CBN Journal of Applied Statistics (JAS)

This study examines the relationship between government expenditure and economic growth and assesses the moderating effects of oil revenue and non-oil revenue in Nigeria from 1981 to 2021. The study uncovered short-term asymmetry in the government expenditure-economic growth nexus while the long-term relationship was symmetric. The study found that government expenditure is a significant determinant of economic growth in Nigeria and that oil and non-oil revenue influences the nexus between government expenditure and economic growth in Nigeria positively. The study recommends efficient management of oil revenue, directing investments during high revenue periods and ensuring fiscal sustainability. Government should also establish …

Improving The Efficiency Of Exponential Ratio-Type Estimator For Population Median: A Calibration Weight Adjustment Approach, Mathew J. Iseh, Kufre J. Bassey

CBN Journal of Applied Statistics (JAS)

This paper modifies the Bahl and Tuteja exponential ratio-type estimator for population median under simple random and stratified sampling schemes using calibration weight adjustment technique with supplementary information to vary the stratum weights. The bias and mean square error of the modified estimator were obtained up to the second-order approximation, which satisfies the necessary conditions for efficiency. The findings show that the new estimator surpasses existing estimators in efficiency gain. This suggests the appropriateness of calibration weight modification in boosting the efficiency of a population parameter estimator under stratified random sampling especially where the population parameter of the auxiliary variable …

Sweet And Timely Insurance: The Role Of Honey In Reducing Coffee Producer Food Insecurity Exposure In Mexico, Grant Xavier Storer

Master's Theses

Smallholder coffee producers face a combination of pre- and post-harvest risk factors that leaves them particularly vulnerable to food insecurity. A popular form of on-farm diversification is honey production through beekeeping, that has both nutritional and commercial value. This study investigates the role of honey production as means of food security management due to the heightened pollinating activity during the coffee flowering stage that follows the annual coffee harvest provides an additional non-contemporaneous source of income. Using primary data collected in coffee-producing regions of Chiapas, Mexico, I find that during the honey harvest months, which occurs during the early stage …

Savings-Investment Gap In Sub-Saharan Africa: Does The Interaction Of Financial Sector Development And Migrant Remittances Matter?, Wasiu Adekunle, Oluwatosin Adeniyi, Joshua Afolabi, Musibau Babatunde, Edward Omiwale

CBN Journal of Applied Statistics (JAS)

This study analyses the interactive effects of migrant remittances and financial development on savings-investment gap for a panel of 18 Sub-Saharan Africa (SSA) countries from 1990-2017. Results from a panel ARDL model show that migrant remittances reduce savings-investment gap in the long run. The gap is further reduced when the individual effect of financial development, and the interactive effects of migrant remittances and financial development are taken into consideration. Further analysis reveals evidence of widening effects of rising real GDP growth and bank deposits over a long-term horizon, while higher private sector credit widened the savings-investment gap only in the …

Effect Of Monetary Policy Rate On Market Interest Rates In Nigeria: A Threshold And Nardl Approach, Oluwafemi E. Awopegba, Joseph O. Afolabi, Lydia T. Adeoye, Godwin O. Akpokodje

CBN Journal of Applied Statistics (JAS)

This study examines the effect of monetary policy rate (MPR) on market interest rates in Nigeria. For parsimony, we develop two indexes called the short-term interest rate (SINT) and Lending interest rate (LINT) to represent deposit and lending rates respectively. The nonlinear autoregressive distributed lag (NARDL) and threshold regression models are adopted. The study uses monthly data from 2002:M1 to 2019:M12. The results of the threshold regression model indicate that the degree of the effect of MPR on SINT and LINT above the estimated threshold of 11 and 13 percent respectively is greater and significant than if MPR were to …

Social Dimension Of Inclusive Growth In Ecowas: Implication For Poverty Reduction, Toriola K. Anu, Goerge O. Emmanuel, Ajayi O. Felix

CBN Journal of Applied Statistics (JAS)

This study investigates the implication of the social dimension of inclusive growth on poverty reduction in Economic Community of West African States (ECOWAS) countries. It specifically examines how social indices of inclusive growth comprising of income inequality, education, and health outcomes affect poverty reduction. The study uses a panel dataset of the six (6) lower-middle income countries in ECOWAS which was analysed via panel Difference Generalised Method of Moment (D-GMM). The results show that GDP per capita exerts significant negative effect on poverty while inequality, education and health outcomes do not show significant effect on poverty. Although, the estimates of …

Effect Of Fdi Inflows On Employment Generation In Selected Ecowas Countries: Heterogeneous Panel Analysis, Timothy A. Aderemi, Olawunmi Omitogun, Bukonla G. Osisanwo

CBN Journal of Applied Statistics (JAS)

The aim of this study is to examine the effect of FDI on employment in ECOWAS sub region between 1990 and 2019. The study utilizes a panel autoregressive distributed lag model to analyse the short run and long run relationship between FDI and employment across ECOWAS sub region. In the short run, the impact of FDI on employment is negative and statistically not significant. Meanwhile, in the long run FDI has a positive and statistically significant impact on employment rate. This implies that FDI has the capacity to generate employment in countries in ECOWAS sub region. Therefore, this study recommends …

Impact Of Covid-19 Pandemic On The Nigeria Stock Market: A Sectoral Stock Prices Analysis, Peter A. Adekunle, Yakubu A. Bello, Udochukwu G. Nwachukwu

CBN Journal of Applied Statistics (JAS)

This study examines the impact of the COVID-19 pandemic on sectoral stock prices in Nigeria stock market using daily data covering from February 28, 2020 to June 26, 2020. Applying the autoregressive distributed lag (ARDL) bounds test, the study finds that COVID-19 pandemic had adverse impact on the stock market indices in the short run. Furthermore, the study documents negative response of sectoral stock prices to the pandemic while the stock prices of the banking sub-sector are the worst hit. Compared to the consumer goods, and industrial subsector indices, the speed of adjustment to long run equilibrium is faster for …

Rural Development In Papua New Guinea: Mining, Logging, Agriculture, And Alternatives, Tj Askew

CMC Senior Theses

This thesis examines multiple approaches to providing rural, indigenous Papuans with improved social services and economic opportunities. Rural Papuans, who make up 80 percent of the population, face below average rates of nutrition, education, disease, crime, and other quality of life indicators. Due to location, land use rights, lack of infrastructure, and minimal access to economic markets, the PNG government has struggled to provide rural communities with basic social services. Historically, the development of resource extraction projects such as mining, logging, and agriculture have been the main strategies used to improve the livelihood of rural Papuans, with limited success. This …

Food Security, Economic Growth And Price Stability Nexus And Conceptual Issues, Park O. Idisi

Economic and Financial Review

A strong argument that encourages analysing food security and food price stability issues is importance to economic well-being. Nigeria is one of the most food insecure countries and highly affected by all three drivers. For one, the country is vulnerable to price instability and successively hit by environmental disasters, that impact people’s livelihoods. Furthermore, its economy is thriving, but around 48.0 per cent of its population lives below the poverty line (World Bank, 2020; World Poverty Clock, 2020). In addition to that, since 2009 northeastern Nigeria is struck by insurgency. Essentially, sustainability in economic growth is dependent on achievement of …

Embodied Engineering : Gendered Labor, Food Security, And Taste In Twentieth-Century Mali, Laura Ann Twagira

Ohio University Press Open Access Books

Foregrounding African women’s ingenuity and labor, this pioneering case study shows how women in rural Mali have used technology to ensure food security through the colonial period, environmental crises, and postcolonial rule.

By advocating for an understanding of rural Malian women as engineers, Laura Ann Twagira rejects the persistent image of African women as subjects without technological knowledge or access and instead reveals a hidden history about gender, development, and improvisation. In so doing, she also significantly expands the scope of African science and technology studies.

Using the Office du Niger agricultural project as a case study, Twagira argues that …

Can Small-Scale Poultry Initiatives Alleviate Food Insecurity And Increase Empowerment For Women In Economically Disadvantaged Areas?, Patrick Daniels

Accounting Undergraduate Honors Theses

In the summer of 2019, I, along with 8 other students from the University of Arkansas departed the United States for the Central American country of Belize. Despite our limited knowledge of what Belize held in store for us, we were enthusiastic about the coming months. While we had different projects, we all set out with the same universal question in mind. How can we use the knowledge we have gained through education to make a positive impact on the lives of people living in an impoverished town? Some of the members of our team worked alongside local businesses to …

From Self-Sufficiency To Import Dependence In The Republic Of The Marshall Islands: Data Issues And Challenges, Debra L. Claypool

Electronic Theses, Projects, and Dissertations

Although it appears likely that the profoundly asymmetrical political and economic relationship between the United States and the Republic of the Marshall Islands (RMI) has contributed to the abandonment of traditional agriculture, import-dependency, and a decrease in quality of life for the citizens of the RMI, limits in existing quantitative data make it impossible to model exactly how this occurred. Therefore, rather than seek to model this causal relationship, the researcher employed three existing ethnographic studies to establish a quantitative measure of the transformation itself. Using additional government documents to supplement the existing data, a measure of relative percentage of …

Estimating Treatment Effect Heterogeneity In A Comprehensive Microenterprise Intervention, Mary Gathungu

Master's Theses

Do cash transfer programs have heterogeneous treatment effects within the treatment group? Why do some households in these interventions seem to benefit more than others? What is the overall treatment effect of the Microenterprise Intervention? I address these questions through the study of a comprehensive microenterprise intervention program carried out in Kenya, Africa by a non-profit organization called the Village Enterprise Organization and I obtain economic outcome data from a randomized control trial that gives out conditional cash transfer that is conditional on business formation. The Microenterprise Intervention combines cash grants and mentorship and training to achieve long term economic …

The Impact Of Income On Nutrition: A Case Study Of Northern Mozambique, Hunter Swanigan, Lawton Lanier Nalley

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

In 2017, Mozambique ranked as one of the least developed countries in the world by measures of health, education, and income. With a minimal annual income, purchasing adequate food to meet recommended levels of nutrients for a healthy diet is difficult, leaving 40% of the country undernourished. This study analyzed what foods are available during the dry months (hungry season) of May through October in the Nampula province of Mozambique to determine if it is possible to meet recommended levels of nutrients from purchasing and growing food. Three different levels of income were used to determine what percentage of the …

Essays On Nutrition And Cognitive Production In Developing Countries: Evidence From Ethiopia & Nepal, Mohammad Ali

Economics ETDs

This dissertation is comprised of five chapters. The first chapter provides an outline of the three separate research papers that are combined in this dissertation. It highlights the goals of each paper, discusses their importance to the field of economics, and outlines their contributions to the existing literature. The final chapter summarizes the main conclusions from the three research articles and points to how my future research trajectory is shaped by my dissertation research.

The second chapter explores the effect of current health (denoted by BMI for age scores) on cognitive test scores directly and indirectly, through time allocated to …