Asymmetric Inflationary Burden Quantification Across Income Strata via the Differential-Income-Calibrated-Expenditure-Burden Index

Parinyakorn Paengsri

doi:10.2991/978-94-6239-797-2_5

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Asymmetric Inflationary Burden Quantification Across Income Strata via the Differential-Income-Calibrated-Expenditure-Burden Index

Authors

Parinyakorn Paengsri¹^{, *}

¹Sustainability and Entrepreneurship Research Center, School of Management, Mae Fah Luang University, Chiang Rai, Thailand, 57100

^*Corresponding author. Email: parinyakorn.pae@mfu.ac.th

Corresponding Author

Parinyakorn Paengsri

Available Online 14 October 2026.

DOI: 10.2991/978-94-6239-797-2_5 How to use a DOI?
Keywords: Inflation; Purchasing Power; Income Inequality; Price Elasticity; Economic Metrics
Abstract: The standard Consumer Price Index fails to capture the true cost-of-living increases for different income groups. Lower income households allocate a larger share of their earnings to inelastic necessities. This paper introduces the Differential-Income-Calibrated-Expenditure-Burden index. This mathematical formula integrates expenditure weights with category specific price elasticity multipliers. Calculations using 2023 macroeconomic data indicate that the lowest income quintile faces a 21.9 percent higher true inflation burden compared to the highest quintile. The standard metric only shows a 14.1 percent difference. The results show the hidden economic strain on vulnerable populations. The objective quantification of purchasing power erosion improves economic analysis.
Copyright: © 2026 The Author(s)
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title: Proceedings of the 2nd International Conference on Lifespan Innovation (ICLI 2026) national Conference on Lifespan Innovation
Series: Advances in Social Science, Education and Humanities Research
Publication Date: 14 October 2026
ISBN: 978-94-6239-797-2
ISSN: 2352-5398
DOI: 10.2991/978-94-6239-797-2_5 How to use a DOI?
Open Access: Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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ris enw bib

TY  - CONF
AU  - Parinyakorn Paengsri
PY  - 2026
DA  - 2026/10/14
TI  - Asymmetric Inflationary Burden Quantification Across Income Strata via the Differential-Income-Calibrated-Expenditure-Burden Index
BT  - Proceedings of the 2nd International Conference on Lifespan Innovation (ICLI 2026) national Conference on Lifespan Innovation
PB  - Atlantis Press
SP  - 32
EP  - 39
SN  - 2352-5398
UR  - https://doi.org/10.2991/978-94-6239-797-2_5
DO  - 10.2991/978-94-6239-797-2_5
ID  - Paengsri2026
ER  -

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