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Regional Demand Elasticities for Animal-Sourced Products in Rwanda: A Quadratic Almost Ideal Demand System Approach Cover

Regional Demand Elasticities for Animal-Sourced Products in Rwanda: A Quadratic Almost Ideal Demand System Approach

Open Access
|Sep 2025

Figures & Tables

Fig. 1.

Map of Rwanda by Province and DistrictSource: Maps of Rwanda, https://fr.maps-rwanda.com/le-rwanda-carte-avec-les-districts
Map of Rwanda by Province and DistrictSource: Maps of Rwanda, https://fr.maps-rwanda.com/le-rwanda-carte-avec-les-districts

Fig. 2.

2022 Average Beef and Fish Prices (per pound), and Unit Egg Prices in Rwanda’s Five ProvincesSource: own elaboration.
2022 Average Beef and Fish Prices (per pound), and Unit Egg Prices in Rwanda’s Five ProvincesSource: own elaboration.

Rwanda QUAIDS model’s endogeneity and misspecification tests

Null hypothesisP-valueConclusion^
Exogenous expenditure0.8929Fail to reject
Joint conditional mean0.004Reject
Nonnormality0.429Fail to reject
Linearity0.095Fail to reject
No structural change0.008Reject
Dependence0.565Fail to reject

Unconditional Marshallian Own-Price and Cross-Price Elasticities for animal-sourced products using 2022 Rwanda data

Price

beefeggfish
All
beef–0.41–0.38–0.41
egg–0.31–0.07–0.37
fish0.47–0.014–0.93
Kigali
beef–0.35–0.056–0.39
egg–3.032.640.037
fish0.030.072–0.51
Rural
beef–0.41–0.37–0.38
egg0.027–0.470.07
fish0.53–0.008–0.96

Quadratic almost ideal demand system parameter estimates for beef, fish, and eggs using Rwanda data, 2022

Type of expenditurePriceExpenditure

beeffishegglinearquadratic
Beef0.229* (7.93)–0.130* (−4.90)–0.099* (−2.43)0.049 (0.92)0.020* (6.21)
Fish–0.130* (−4.90)0.153* (5.39)–0.024 (−1.27)–0.145* (−6.24)–0.016* (−8.44)
Egg–0.099* (−2.43)–0.024 (−1.27)0.123* (2.67)0.096* (2.23)–0.004* (−1.38)

Mean Conditional Marshallian Own-Price and Cross-Price Elasticities for animal-sourced products using 2022 Rwanda data

Price

beefeggfish
All
beef–0.19 (0.21)–0.27 (1.18)0.56 (0.53)
egg–0.02 (0.11)0.00 (1.09)0.13 (0.15)
fish0.19 (0.14)–0.26 (0.25)–0.69 (0.46)
Kigali
beef–0.01 (0.06)–3.02 (0.97)0.32 (0.06)
egg–0.17 (0.06)2.64 (1.01)0.04 (0.02)
fish–0.17 (0.12)0.38 (0.04)–0.36 (0.09)
Rural
beef–0.22 (0.21)0.09 (0.56)0.60 (0.56)
egg–0.02 (0.11)–0.34 (0.42)0.14 (0.16)
fish0.20 (0.14)0.25 (0.27)–0.74 (0.47)

Mean conditional and unconditional expenditure elasticities for animal-sourced products using 2022 Rwanda data

Food groupConditionalUnconditional

allKigaliruralallKigalirural
Beef0.69 (0.18)0.86 (0.06)0.66 (0.17)0.530.670.51
Egg1.13 (0.63)–0.29 (0.09)1.31 (0.37)0.87–0.221.01
Fish1.86 (0.67)1.41 (0.21)1.92 (0.69)1.431.091.49

Average Expenditure and Budget Share Allocated to Beef, Fish, and Eggs in Rwanda’s Five Provinces in 2022

ProvinceExpenditures*Budget share

beeffisheggbeeffishegg
East4 434.281 021.49722.910.6510.2360.111
Kigali city5 423.521 536.11436.840.7720.2130.014
North5 775914.34323.520.4160.4160.166
South4 339.53682.97482.040.7290.1620.107
West4 334.281 459.42608.940.5890.2220.188
DOI: https://doi.org/10.17306/j.jard.2025.3.00024r1 | Journal eISSN: 1899-5772 | Journal ISSN: 1899-5241
Language: English
Page range: 371 - 383
Accepted on: Aug 25, 2025
Published on: Sep 30, 2025
Published by: The University of Life Sciences in Poznań
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2025 Ralph P. Jean-Pierre, B. Wade Brorsen, Karl M. Rich, published by The University of Life Sciences in Poznań
This work is licensed under the Creative Commons Attribution 4.0 License.