Sociodemographic factors and irrationality in purchasing decisions of staple products in supermarkets in the district of Trujillo 2025

Authors

DOI:

https://doi.org/10.37787/em9s2j86

Keywords:

Irracionalidad, decisiones de compra, factores sociodemográficos, economía conductual

Abstract

The study aimed to identify the sociodemographic factors related to irrationality in purchasing decisions for basic necessities. The factors considered were age, gender, educational level, income level, and marital status, while irrationality was assessed through the presence of heuristics and cognitive biases. The research adopted a mixed approach whose quantitative sample included 664 consumers and the development of a multiple regression model to estimate the explanatory power of the factors. Qualitatively, semi-structured interviews were conducted with 30 intentionally selected participants. The research determined that the sociodemographic factors studied have limited explanatory power over irrationality in purchasing circumstances (adjusted R² = 0.021). Only educational level and income level showed significant associations, while the others were not determinative. Qualitatively, it was observed that although consumers perceive themselves as rational, in practice their decisions are affected by heuristics and biases, as well as emotions, customs, and commercial stimuli. In conclusion, the variation in irrationality is poorly explained by sociodemographic factors and depends to a greater extent on cognitive aspects and circumstantial factors that affect the purchasing decision environment.

References

Avanzi, D., Guissoni, L. A., Rodrigues, J. M., & D’Andrea, R. (2020). Cognitive biases in merchandising activation and effect on supermarket sales. RAE – Revista de Administração de Empresas, 60(4), 262–272. https://doi.org/10.1590/S0034-759020200403

Blake, D., Cannon, E., & Wright, D. (2021). Quantifying loss aversion: Evidence from a UK population survey. Journal of Risk and Uncertainty, 63(1), 27–57. https://doi.org/10.1007/s11166-021-09356-7

Bozyer, S., & Doğan, S. (2022). E-ticarette bilişsel önyargılar ve tüketici kararlarına etkileri [Cognitive biases in e-commerce and their effects on consumer decisions]. Bartın Üniversitesi İktisadi ve İdari Bilimler Fakültesi Dergisi, 13(26), 195–219. https://doi.org/10.47129/bartiniibf.1181624

Faraz, N., & Anjum, A. (2025). Spendception: The psychological impact of digital payments on consumer purchase behavior and impulse buying. Behavioral Sciences, 15(3), 387. https://doi.org/10.3390/bs15030387

Giráldez-Cru, J., Chica, M., & Cordón, O. (2023). An integrative decision-making mechanism for consumers’ brand selection using 2-tuple fuzzy linguistic perceptions and decision heuristics. International Journal of Fuzzy Systems, 25(1), 59–79. https://doi.org/10.1007/s40815-022-01385-x

Hernández Sampieri, R., Fernández Collado, C., & Baptista Lucio, P. (2018). Metodología de la investigación: Las rutas cuantitativa, cualitativa y mixta (6.ª ed.). McGraw-Hill.

Kahneman, D. (2012). Pensar rápido, pensar despacio. Debolsillo.

Kahneman, D., & Tversky, A. (1979). Prospect theory: An analysis of decision under risk. Econometrica, 47(2), 263–291. https://doi.org/10.2307/1914185

Meissner, T., Gassmann, D. X., Faure, C., & Schleich, J. (2023). Individual characteristics associated with risk and time preferences: A multi-country representative survey. Journal of Risk and Uncertainty, 66(1), 77–107. https://doi.org/10.1007/s11166-022-09383-y

Ministerio de Salud del Perú. (2025). Estadística poblacional. Tableau Software. https://public.tableau.com/views/Poblacionestimada/INICIO

Muthusamy, G., & Teoh, K. T. G. C. (2020). The rational–irrational dialectic with the moderating effect of cognitive bias in the Theory of Planned Behavior. European Journal of Molecular & Clinical Medicine, 7(3), 240–250.

Nie, W., Abler, D., & Li, T. (2021). Food safety vs. quality choice: The influence of loss aversion and income effect on consumer preferences in China. Frontiers in Psychology, 12, Article 711671. https://doi.org/10.3389/fpsyg.2021.711671

Rizal, S. (2017). Use of mental accounting in purchase decision making with reference to demographic characteristics of consumer. International Journal of Scientific and Research Publications, 7(9), 203–215. https://www.ijsrp.org/research-paper-0917.php

Sánchez Gómez, L. F. (2023). Análisis y medición del efecto anclaje en la población bogotana segmentada por variables socioeconómicas [Tesis de maestría, Pontificia Universidad Javeriana]. Repositorio institucional Pontificia Universidad Javeriana.

Sharma, R., Mishra, N., & Pande, S. (2022). Impact of demographic variables on behavioural dispositions of individual investors: An empirical analysis. Advanced Engineering Science, 54(2), 1497–1514.

Simon, H. A. (1955). A behavioral model of rational choice. The Quarterly Journal of Economics, 69(1), 99–118. https://doi.org/10.2307/1884852

Thaler, R. H. (2016). Todo lo que he aprendido con la psicología económica: El encuentro entre la economía y la psicología, y sus implicaciones para los individuos (3.ª ed.). Deusto.

Thaler, R. H., & Sunstein, C. R. (2009). Un pequeño empujón (Nudge): El impulso que necesitas para tomar mejores decisiones. Taurus.

Wang, J., Shen, M., & Gao, Z. (2018). Research on the irrational behavior of consumers’ safe consumption and its influencing factors. International Journal of Environmental Research and Public Health, 15(12), 2764. https://doi.org/10.3390/ijerph15122764

Published

2026-06-30

Data Availability Statement

Buenos dias señores editores. El trabajo presentado fue expuesto  en la XLIV Jornada Nacional-XXXI Jornada internacional de investigacion cientifica de Posgrado organizada por la Universidad Nacional de Trujillo entre el 09 y 10 de setiembre del 2025.

Resalto que se trató tan sólo de una ponencia ante un jurado  e interesados en el tema mas no hubo ningun compromiso de publicación o algo similar.

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Artículos Originales

How to Cite

Rodríguez Moncada, J. J., Rodríguez Moncada , R. E., & Maguiña Rivero , . O. F. (2026). Sociodemographic factors and irrationality in purchasing decisions of staple products in supermarkets in the district of Trujillo 2025. Pakamuros Scientific Journal, 14(2), 4-20. https://doi.org/10.37787/em9s2j86

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