A Food Demand System Estimation for Rural Malawi: Estimates Using Third Integrated Household Survey Data (original) (raw)

Status of Food Security among the Vulnerable Sections of Rural Households: An Application of Almost Ideal Demand System (AIDS) Model

Consumption behaviour studies are essential in order to define poverty lines on the basis of food intake of the population. It is important to understand how the consumer reacts to the sudden price changes in the market as it would help governments to decide whether to subsidize the food commodities or not. In this study, Almost Ideal Demand System (AIDS) model has been employed to estimate the system of demand functions for cereals, pulses, oils, salt and spices, meat, milk, and sugar. The statistical significance of the coefficients suggested that the demand for various food commodities was responsive to prices. The expenditure elasticities were positive and significant for all the commodities. All the food commodities were found to be normal goods. In addition all the goods were also found to be income elastic. This implied that the expenditure share on these commodities would increase with an increase in real income and vice-versa. The own price elasticities of the commodities revealed that the subsidized commodities (cereals, pulses, oil and sugar) were found to comprise the predominant source of food basket of the rural households and their signs were also expectedly positive. At the same time since the other remaining commodities including being not subsidized, their signs were found to be negative. Further, as all the commodities (except sugar) were price elastic any change in their prices would have strong negative or positive effect on expenditure basket of the households. Thereby the possibility of food inflation could severely hamper their consumption status and make the households vulnerable to food security. In India and other developing countries poverty lines are usually defined on the basis of food or energy intake of the households. In this context consumption behaviour studies are essential in order to develop appropriate policies to address wide range of development issues. Various rounds (27 th , 32 nd , 38 th , 43 rd , 55 th and 61 st) of NSSO 1 have revealed that there has been a decline in the proportion of food expenditure during the last three decades in both urban and rural areas alike. As the expenditure on food goes down then there are increased possibilities for people to spend on non-food items. This indicates improvement in the welfare as laid down by Engel's Hypothesis. However food expenditure still remains comparatively higher in the rural areas thereby leaving very little money for the people to spend on non-food expenditure. Thereby the analysis of food consumption in rural India is of greater interest. It facilitates not only to understand the existing food consumption pattern but also reveals the future consumption habits. Further, the volatile behavior of food prices also poses to be a severe threat to food security most importantly in rural areas. Cconsumption expenditure patterns and estimates of expenditure elasticities can give an indication of the potential for demand-led growth in a particular economy (Browne et al., 2007). Knowledge on such elasticities will assist policy makers for making decisions in the context of food-aid programmes for the vulnerable sections. In this way the effect of price and income fluctuations on markets and consumers would be known along with their responses to food aid influxes. Knowing how food markets react is important since markets are the interface through which individuals gain most access to food and are an essential element for strategies to ensure that the vulnerable segments of the population have access to food. Consumption behaviour can be better understood through demand system models. Models for estimating consumer demand could broadly be divided into primal and dual models (Pollak and Wales, 1979). The well known primal models are Stone's Linear Expenditure System (LES) and Lluch's Extended Linear Expenditure System (ELES). LES and ELES are more flexible, because of the lower degree of non-linearity. But a common criticism of LES is that it is based on Geary-Stone utility function which rules out inferior goods. But several studies (Murty,1999) indicate that in India the consumption pattern is generally observed to be non-linear. In this ground, it is reasonable to exclude LES and ELES for estimation. The most widely used

Investigating Household Food Expenditures and the Engel’s curve in Ghana: The Empirics

2018 International Conference on Multidisciplinary Research

This paper examines Ghana's annual household food expenditures and their Engel food curve using data from the 2013-2014 sixth round of the Ghana Living Standards Survey which covered 16, 772 household and lasted for one-year. A sample size of 16,035 was however valid for the model estimation in this paper. Household demographics and specific variables, including income, education status, religion, number of rooms, access to clean water, ownership of household, electricity supply to household, and refrigerators availability at the household that influence the annual household food budget decisions in Ghana are examined. It establishes an inverse relationship between the share of the household food budget and the increase in household income. The paper established high annual household food expenditure elasticity with 0.52 pesewas out of every one cedi serving as an annual household marginal food budget share in Ghana, on average and ceteris paribus and provides additional statist...

Household consumption and demand for bean in Uganda: Determinants and implications for nutrition security

2016

Pulses are vital for nutrition security and considered a cost-effective option for improving the diets of low-income consumers in developing countries. Sub-Saharan Africa has the highest proportion of people living in extreme poverty and highest per capita pulse consumption in the world. Most studies on pulse demand have largely depended on aggregated data at regional level and there is little information on household level consumption patterns across sub-population groups within the same geographical location. This study uses the most recently collected LSMS-ISA data in Uganda, which is nationally representative, to analyze household food demand, with a focus on bean (Phaseolus vulgaris L.) consumption in order to unmask differences between poorer and better-off households in urban and rural areas. An augmented Quadratic Almost Ideal Demand System (QUAIDS), accounting for censoring, is used to estimate household food demand, where bean is included as its own food group. Household s...

Food demand elasticities in Ethiopia: Estimates using household income consumption expenditure (HICE) survey data

2011

How households adjust their consumption in response to changes in prices and income is crucial determinant of the effects of various shocks to market prices and commodity supplies. These adjustments in demand are particularly significant in Ethiopia, where many households consume inadequate quantities of calories, protein and other nutrients. Household consumption behaviour in the country is also rather complex. Regional consumption patterns differ considerably with no single staple dominating. Instead, four different cereals (teff, wheat, maize and sorghum) are major staples in parts of the country and even within most regions, two or more food staples account for relatively large shares of total calories and food expenditures1.

Analysis of household food demand and its implications on food security in Kenya: an application of QUAIDS model

2018

This paper evaluates household food security situation in Kenya in terms of access to food, using cross sectional data from the Kenya Integrated Household Budget Surveys (KIHBS). By estimating price and income elasticities, which provides an indication of the sensitivity of households to market shocks and thus the degree of household’s constraint to access food. The empirical approach involve estimation of demand system analysis the QUAIDS model. Existing research focuses on disaggregate food items and other developing countries, but none has specifically used the QUAIDS model for the aggregated food groups to analyse food consumption patterns nationally for the Kenyan context. The empirical results show positive expenditure elasticities while all compensated and uncompensated price elasticities show negative results. While their magnitudes vary; expenditure elasticities for meat and fish, and essential condiments are elastic (sensitive to changes) and are considered as luxuries as ...

The trends and effects of food price inflation on the cost and affordability of nutritionally adequate diets in Malawi

World Nutrition, 2023

Background Global challenges of hunger, food insecurity, and malnutrition persist, with nearly one in three people lacking sufficient food access. The COVID-19 pandemic exacerbated these issues, particularly in Africa, where 59.6% of the population grapples with food insecurity. Malawi faces high stunting and anaemia rates in children, driven by poverty, inadequate health services, and improper diet. Despite progress, the prevalence remains above regional averages. Research reveals imbalanced diets in Malawi, primarily reliant on maize, risking micronutrient deficiencies. This study examines diet affordability in the context of rising costs and low incomes, aiming to influence policy in addressing undernutrition in Malawi and highlighting the overlooked role of affordability in nutrition access. Objectives This assessment aimed to estimate the minimum cost of a nutritious diet using locally available and culturally acceptable food items in Malawi. The objective was to explore how economic constraints affect Malawian households, particularly the poor and ultra-poor, in accessing such diets. Additionally, it sought answers to questions about cost changes over 12 months and affordability among different wealth groups in the country. Methods This study involved secondary data analysis by employing the Cost of the Diet (CotD) research method and software. The World Food Programme’s Minimum Expenditure Basket (MEB) provided monthly food prices for 28 items from April 2021 to March 2022. Comparing the cost of a nutritious diet with per capita income from the Malawi Poverty Report, we estimated the affordability gap. Food price data was from 77 markets in 25 districts, ensuring national representation. Results The annual cost of a culturally acceptable nutritious diet for a five-person household from April 2021 to March 2022 was MWK 84,658/month (≈$103). The diet’s cost increased by 25% during the period, from MWK 2,519 to MWK 3,140 per day. Only average urban households had sufficient income to afford the diet, with a 9.7% surplus. Ultra-poor, poor, rural, and average Malawian households faced affordability gaps of 139.5%, 61.4%, 48.5%, and 32%, respectively. Closing the affordability gap would require additional monthly income of 29,134 kwacha (≈$35.5) for an average Malawian household, 37,481 kwacha for a typical rural household, 42,452 kwacha for a poor household, and 58,885 kwacha for an ultra-poor household. Conclusion The CotD assessment revealed a significant increase in the cost of a nutritious diet over the past 12 months. Most of the population cannot afford the cheapest nutritious diet. The recent currency devaluation may worsen the situation. Cash, voucher or food distribution could help close the affordability gap for poor and ultra-poor households. Regular monitoring and ongoing updates of the CotD results are necessary for informed decision-making.

Analysis Food Demand of Java Households with Aids Model Estimates

Media Ekonomi dan Manajemen, 2022

The quantity and quality of food consumed by the community are determined by the price level and household income. Household food expenditure share is still dominated by rice commodities. The aims of this study are 1) to analyze the level of household expenditure on food in Java and (2) to analyze the expenditure elasticity and price elasticity of household food demand in Java. The data used was March 2015, 2016, and 2017 SUSENAS data. Household consumption data was estimated using the AIDS Model. The results showed that household food expenditure share for medium and low-income groups (Q3 and Q4) for urban and rural areas was more than 50 percent. This shows that the household is food insecure. The own-price elasticity for all commodities is negative and inelastic. Changes in food prices do not significantly affect changes in demand for food commodities because their elasticity is inelastic. Household food demand is more influenced by food prices than household income for food comm...