I am a PhD candidate at Wharton researching consumer behavior. My research focuses on how cognitive biases influence consumer decision making. I aim to answer questions such as:
  • When do consumers overspend on products that improve their chances of attaining their goals?
  • Do charitable donors give more to anti-malaria charities that can provide bed nets at lower costs, or could they actually give less?
  • Why are consumers more sensitive to discounts off of lower prices?
  • ​Does a sales price feel lower relative to a single high list price or a range of high list prices?

​A list of my papers is below, and you can read more about my projects here.​
​My CV is available here. 
You can email me at: lejoshua@wharton.upenn.edu.
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​​Publications and Manuscripts in the Review Process
(updated June 2019)

Lewis, Joshua, Celia Gaertig, and Joseph P. Simmons (2019), “Extremeness Aversion Is a Cause of Anchoring,” Psychological Science, 30(2), 159–173. 
 
Lewis, Joshua and Joseph P. Simmons, “Prospective Outcome Bias: Incurring (Unnecessary) Costs to Achieve Outcomes That Are Already Likely,” under second round review (with minor revisions) at Journal of Experimental Psychology: General.
 
Lewis, Joshua, Alex Rees-Jones, Uri Simonsohn, and Joseph P. Simmons, “Diminishing Sensitivity to Outcomes: What Prospect Theory Gets Wrong about Diminishing Sensitivity to Price,” under review at Journal of Marketing Research.
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​Working Papers
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Lewis, Joshua and Deborah A. Small, “Ineffective Altruism: Giving Less When Donations Do More Good.”

Lewis, Joshua and Joseph P. Simmons, “The Directional Anchoring Bias.”
  
Green, Etan A., Joshua Lewis, “The Forgone-Option Fallacy.”

Green, Etan A. and Joshua Lewis, and David Rothschild, “Barely Plausible Anchor Values Maximize Bias.”
 
Moore, Alexander, Joshua Lewis, Emma E. Levine, and Maurice E. Schweitzer, “Trusting Kind Friends and Fair Leaders: How Relationships Affect the Antecedents of Trust.”
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