Glossary · Pricing Strategy
Price Discrimination
also: personalized pricing · differential pricing · first-degree price discrimination · second-degree price discrimination · third-degree price discrimination
Definition
Price discrimination is the practice of charging different customers different prices for the same or near-equivalent good, based on willingness to pay. The Pigou taxonomy (first, second, third degree) distinguishes individual customization, self-selection via menu, and segment-level pricing. Legal and reputational constraints govern what is allowable.
Price discrimination is the most-studied lever in microeconomic pricing theory. First-degree (perfect personalization to each customer's WTP) is theoretically optimal for the seller but rarely achievable in practice. Second-degree uses menu design so customers self-sort into bundles or volume discounts that map roughly to WTP. Third-degree segments markets on observable characteristics (geography, B2B vs B2C, student/senior discounts). Dynamic pricing algorithms blur the legal line by personalizing on inferred WTP; jurisdictions including the EU and several US states constrain what may be discriminated on. Reputational risk, the Amazon 2000 DVD pricing incident remains the canonical cautionary tale, often binds before the legal line.
Essays on this concept
- E-commerce ML
Dynamic Pricing Under Demand Uncertainty: A Contextual Bandit Approach with Fairness Constraints
Airlines have done dynamic pricing for decades. E-commerce is catching up - but without the fairness constraints that prevent algorithms from charging different people different prices for the same product based on inferred willingness to pay.
- Behavioral Economics
The Decoy Effect Reimagined: Dynamic Price Anchoring with Real-Time Behavioral Segmentation
A dominated third option can shift 22% more users to your premium plan. But the static decoy is dead, here's how real-time behavioral data makes asymmetric dominance adaptive.
- Pricing Strategy
Value-Based Pricing Operationalized: A Measurement Framework
Most teams talk about value-based pricing without operationalizing it. The conjoint and Van Westendorp workflow, the stated-versus-revealed gap, and the cases where it breaks down in practice.
- Pricing Strategy
Pricing Experimentation Without the Legal Risk: An Operator Framework for Defensible A/B Tests
Price A/B tests are not, by themselves, illegal. Most of the legal risk lies in how the cohorts are formed, what data is used, and what the team can show a regulator a year later. This is the framework that survives the question.
- Pricing Strategy
Cost-Plus Pricing in a Margin-Compressed World
Cost-plus pricing survives in industrials and commodities for reasons unrelated to optimality. The honest question is when it is correct, when it triggers a death spiral, and how hybrid models reset the floor.
- Pricing Strategy
Pricing Pages as Information Architecture
The pricing page is the highest-leverage UX surface in most SaaS products. Treat it as information architecture, and the conversion math reorganizes around plan structure, comparison cognition, and CTA placement.
- Digital Economics
The Economics of Zero Marginal Cost Bundling: When Adding Products Decreases Revenue
In digital markets, the marginal cost of adding one more product to a bundle is zero. Conventional wisdom says bundle everything. The data says the opposite, past a threshold, each addition dilutes the bundle's perceived value and total willingness to pay drops.
- Digital Economics
Attention Economics Quantified: Measuring the True CPM of Cognitive Load in Digital Advertising
CPM measures whether an ad loaded in a browser. It says nothing about whether a human noticed it. Here's a framework for pricing what actually matters, the cognitive cost of attention, and why the gap between CPM and true attention cost is where billions in ad spend disappear.
- Pricing Strategy
Bundle Pricing Optimization: A Combinatorial Approach
Bundle pricing is a combinatorial-optimization problem before it is a marketing one. Adams-Yellen gives the formal conditions, and the computational complexity is non-trivial.
- Pricing Strategy
Currency Localization and Willingness-to-Pay Differentials
Local-currency presentation moves willingness to pay by 5 to 15% in tested field experiments. The math behind PPP adjustment, the operational complexity, and where the easy framing breaks down for B2B and tax.
- Pricing Strategy
Dynamic Pricing Fairness Audits: A Practitioner Method for Pre-Launch and Continuous Review
Dynamic pricing systems can drift into discrimination without anyone in the team intending it. The audit method is borrowed from credit modeling, adapted for pricing CI/CD, and made boring enough to run every release.
- Digital Economics
The Micro-Economics of API Pricing: Marginal Cost, Value Capture, and Developer Elasticity
An API call costs fractions of a cent to serve but can generate thousands in downstream value. The gap between marginal cost and captured value is where the entire API economy lives, and most companies price this gap wrong.
- E-commerce ML
Personalized Promotion Optimization: Uplift Modeling to Identify Who Needs a Discount vs. Who Would Buy Anyway
70% of promotional spend goes to customers who would have purchased at full price. Uplift modeling identifies the 30% whose behavior actually changes with a discount, and ignores the rest. The math isn't complicated. The organizational willingness to stop blanket discounting is.
Authoritative references