Intertemporal Choice & Hyperbolic Discounting: From Vaccines to Energy Policy

Individual decision-making often suffers from a fundamental conflict: The present self wants comfort, while the future self needs security.

This struggle, central to Intertemporal Choice, manifests in everything from public health to global energy transitions. At its heart lies Hyperbolic Discounting.

1. The Core Concept: Hyperbolic Discounting

In classical economics, we assume people discount the future at a constant, exponential rate. In reality, we are much more “present-biased.”

We overvalue immediate rewards and overstate immediate costs. This leads to a decision failure where we choose a smaller, sooner benefit (like avoiding a 30-minute queue or a small tax) over a much larger, later gain (like long-term immunity or a stable climate).

2. From Vaccination to Energy Policy

My recent research on Waiting Time as a Behavioral Barrier in vaccination shows how even a 3-month delay in protection leads to a “utility cliff.” This is a classic example of hyperbolic discounting: the short-term cost of waiting outweighs the massive long-term benefit of health.

But this model extends far beyond health. Consider Energy Policy:

• The Problem: Energy transitions (like shifting to renewables or nuclear) are typical “current cost, future benefit” models.
• The Bias: Implementing green energy requires significant upfront investment and potential short-term price hikes. The benefits—reduced emissions and energy independence—are decades away.
• The Short-sighted Path: Because of hyperbolic discounting, both voters and policymakers tend to favor cheaper, fossil-fuel-based energy paths that provide immediate relief but catastrophic long-term costs.

3. The Princeton PPPP Connection

As I look toward the Peking-Princeton Project (PPPP) and related energy policy research at Princeton, my goal is to introduce these behavioral models into energy systems modeling.

By quantifying the “behavioral discount rate” of different demographics, we can design policies that “nudge” society toward long-term thinking. Whether it’s a vaccine or a power plant, the challenge remains the same: Helping our present selves make choices our future selves will thank us for.

This is the second installment in a series exploring the intersection of behavioral economics and public policy. Join me on April 14, 2026, for my PhD dissertation defense!