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haoranmattwan/README.md

Haoran (Matt) Wan, Ph.D.

Assistant Professor of Behavioral Science
Division of Social Sciences, Duke Kunshan University

Website · Google Scholar · ORCID · OSF · Email

Research

I study how age and income shape decision-making across the adult lifespan. My research focuses on delay and probability discounting: how people value rewards that are delayed, uncertain, or both delayed and uncertain.

I examine why these preferences differ across individuals and across adulthood, with particular attention to personality, cognitive ability, financial security, and financial literacy. This work connects judgment and decision-making, cognitive aging, and behavioral economics to clarify how people weigh time and uncertainty in consequential choices.

My research uses behavioral experiments, psychometrics, mathematical models of choice, and Bayesian and multilevel methods. I am committed to transparent, reproducible research and share analysis code and open materials whenever possible.

Current Research Directions

  • Age and socioeconomic differences in intertemporal and risky choice
  • Decisions involving outcomes that are simultaneously delayed and probabilistic
  • Financial and cognitive resources as moderators of decision-making across adulthood
  • Measurement and mathematical modeling of discounting

Selected Recent Publications

For a complete publication list, see my Google Scholar profile or website.

Open Research Repositories

These repositories contain reproducible analyses for peer-reviewed research. Each project documents the research question, analytic workflow, and links to the associated publication and open materials when available.

Study Focus Resources
Brief assessments of delay discounting (The Psychological Record, 2025) Psychometric evaluation of brief monetary choice and delayed-loss questionnaires Code · Paper · Data
Age, income, and delayed monetary losses (The Journals of Gerontology: Series B, 2025) How age and income jointly relate to the discounting of delayed losses Code · Paper · Data
Probability discounting in pigeons (Journal of the Experimental Analysis of Behavior, 2025) Mathematical modeling of probabilistic food reinforcement Code · Paper · Data
Measurement of delayed-loss discounting (Behavioural Processes, 2024) Convergence across procedures and measures of delayed-loss discounting Code · Paper · Data
Age, income, and delay discounting (Psychology and Aging, 2024) Income as a moderator of age differences in delay discounting Code · Paper · Data
Individual differences in delay discounting (Behavioural Processes, 2023) Convergence across procedures and measures of delayed-reward discounting Code · Paper
Social familiarity and reinforcement value in rats (Frontiers in Psychology, 2023) Behavioral-economic analysis of demand for social interaction Code · Paper
Demand and preference for social and food reinforcement in rats (Learning and Motivation, 2022) Own-price and cross-price demand for social and food reinforcement Code · Paper
Altruistic food sharing in rats (Frontiers in Psychology, 2021) Experimental tests of altruistic food sharing Code · Paper

Popular repositories Loading

  1. haoranmattwan.github.io haoranmattwan.github.io Public

    JavaScript

  2. altruistic-behavior-rats-2021 altruistic-behavior-rats-2021 Public

    Open research compendium for Wan et al. (2021): data, Bayesian multilevel analyses in R and Python, figures, and materials on food sharing and social choice in rats.

    HTML

  3. behavioral-economic-demand-analysis-2022 behavioral-economic-demand-analysis-2022 Public

    Open, reproducible R, Python, and Stata analyses of own- and cross-price demand for food and social reinforcement in rats (Kirkman et al., 2022).

    Jupyter Notebook

  4. discounting-delayed-gains-procedure-comparison-2023 discounting-delayed-gains-procedure-comparison-2023 Public

    Reproducible R and Python analyses comparing the reliability, convergent validity, and interchangeability of two widely used delay-discounting measures.

    HTML

  5. demand-analysis-social-familiarity-2023 demand-analysis-social-familiarity-2023 Public

    Reproducible R and Python workflows for Schulingkamp et al. (2023), applying zero-bounded exponential demand models to social reinforcement in rats.

    Python

  6. age-income-discounting-2024 age-income-discounting-2024 Public

    Open-science data and reproducible R/Python analyses for Wan et al. (2024) on age, household income, psychological distress, and delay discounting across adulthood.

    Jupyter Notebook