[Research Contribution] An Economic Model for Analyzing Infidelity: Towards Sustainability in Marriage

12 May, 2025

Keywords: Economic model, Analysis of infidelity, Sustainability, Marriage

The research from University of Economics Ho Chi Minh City (UEH) suggests an economic model to decode the motivation for infidelity in romantic relationships. By analyzing financial, social, and psychological factors, this research provides insights for individuals and policy makers to develop strategic measures to protect marital fidelity.

Infidelity, a stigmatized phenomenon in many cultures is becoming a common problem with negative consequences for individuals and society. The research concludes that factors like income, power, and marital dissatisfaction are the main causes of this behavior. While previous studies have focused on demographic and psychological aspects, this study delves into an economic theoretical framework to explain decisions related to infidelity.

The study draws on Fair’s utility maximization theory, analyzing infidelity in romantic relationships through financial, psychological, and social factors. The theory focuses on how individuals make decisions between three options: remaining faithful, divorcing, or having an affair. The model suggests that one’s decision depends on the current level of satisfaction compared to the potential benefits from other options.

The model also assumes that factors like income inequality, social power, and emotional commitment play an important role in shaping the motivation to commit infidelity. These factors are measured through economic variables like the emotional, financial, and social risks associated with this behavior.

The research results bring in the following outcomes:

*Conditions leading to infidelity

Infidelity occurs when: (1) The expected benefits from a new relationship outweigh the current benefits; therefore, individuals tend to look for an alternative partner when they feel dissatisfied in their current relationship; (2) The financial and social costs of infidelity are low: if infidelity does not result in serious financial or reputational losses, the likelihood of this behavior occurring is higher.

The model equation means that, to reduce the likelihood of infidelity, the costs associated with this behavior need to be increased, such as social pressure or legal intervention.

*The effect of time

Another notable finding is that the probability of infidelity decreases over time as the level of satisfaction in the current relationship tends to increase. The model suggests that improving relationship quality through actions like improving communication, increasing empathy, and sharing responsibility will help reduce the risk of infidelity in the long term.

*The role of socio-economic factors

Research highlights that individuals with higher incomes or positions of power in society tend to be more likely to engage in infidelity as they have more opportunities and resources to engage in new relationships. Conversely, those who are under economic pressure or have high family responsibilities tend to remain faithful as the costs of infidelity are too significant.

*Psychological and emotional factors

Emotional and sexual dissatisfaction have been identified as key factors leading to infidelity. Individuals experiencing high levels of stress or emotional deprivation are more likely to be attracted to external relationships. However, improving emotional attachment in the current relationship, such as through counseling or shared activities, can help reduce this risk.

From the above analysis, the author has proposed practical solutions:

Increasing the cost of adultery: Including applying social measures like increasing the level of stigma against adultery, along with stricter legal policies.

Improving the quality of current relationships: Couples are recommended to participate in psychological counseling programs to increase marital satisfaction. Improving communication and support between partners helps reduce the possibility of adultery.

Social policy support: The state can develop educational programs on relationship management skills and financial support for couples facing economic difficulties.

The study not only provides insights into the economic motivations of adultery but also suggests effective strategies to promote healthy relationships. By integrating economic, social, and psychological factors, the study contributes to building a firm theoretical foundation for policy makers to develop appropriate interventions towards a more stable and happy society.

The full-text research article on An Economic Model for Analyzing Infidelity: Towards Sustainability in Marriage can be accessed HERE.

Authors: Truong Thanh Hiep, Nguyen Thi Bich Hong – University of Economics Ho Chi Minh City.

This article is part of the series spreading research and applied knowledge from UEH with the message “Research Contribution For All – Research for the Community”. UEH cordially invites readers to read the next UEH Research Insights newsletter.

News, photos: The authors, UEH Department of Communications and Partnerships

Audio: Thanh Kieu