SOURCES

The math (chapters 2 and 3)

• Michael V. Marn and Robert L. Rosiello. “Managing Price, Gaining Profit.” Harvard Business Review, September–October 1992. Full text.
• Michael V. Marn, Eric V. Roegner and Craig C. Zawada. “The power of pricing.” McKinsey Quarterly, February 2003.
• Tammo H. A. Bijmolt, Harald J. van Heerde and Rik G. M. Pieters. “New Empirical Generalizations on the Determinants of Price Elasticity.” Journal of Marketing Research 42(2), 2005.
• Thomas Nagle and Georg Müller. The Strategy and Tactics of Pricing: A Guide to Growing More Profitably. Sixth edition, Routledge, 2017.

Existing customers (chapters 4 and 10)

• Eric T. Anderson and Duncan I. Simester. “Price Stickiness and Customer Antagonism.” Quarterly Journal of Economics 125(2), 2010, 729–765. MIT open access; Kellogg summary.
• Best Buy. Price Match Guarantee, read September 2026.

Fairness (chapter 5)

• Daniel Kahneman, Jack L. Knetsch and Richard Thaler. “Fairness as a Constraint on Profit Seeking: Entitlements in the Market.” American Economic Review 76(4), 1986, 728–741.
• Farid Tarrahi, Martin Eisend and Florian Dost. “A meta-analysis of price change fairness perceptions.” International Journal of Research in Marketing 33(1), 2016, 199–203.

Which prices, tiers and framing (chapters 6 and 7)

• Peter R. Dickson and Alan G. Sawyer. “The Price Knowledge and Search of Supermarket Shoppers.” Journal of Marketing 54(3), 1990.
• Reuters, via BNN Bloomberg. “Procter & Gamble hikes U.S. prices amid tariff challenges, CEO change.” July 29, 2025.
• Itamar Simonson. “Choice Based on Reasons: The Case of Attraction and Compromise Effects.” Journal of Consumer Research 16(2), 1989, 158–174.
• Shane Frederick, Leonard Lee and Ernest Baskin. “The Limits of Attraction.” Journal of Marketing Research 51(4), 2014.
• John T. Gourville. “Pennies-a-Day: The Effect of Temporal Reframing on Transaction Evaluation.” Journal of Consumer Research 24(4), 1998, 395–408.
• John T. Gourville. “The Effects of Monetary Magnitude and Level of Aggregation on the Temporal Framing of Price.” Marketing Letters 14, 2003, 125–135.

Notice and grandfathering (chapter 8)

• California Business and Professions Code § 17602, as amended by AB 2863 (Stats. 2024, ch. 515), subdivision (g), applying from July 1, 2025.
• New York General Business Law § 527-a, as amended in 2025.

The loyalty tax (chapter 9)

• Competition and Markets Authority. Loyalty penalty super-complaint, filed by Citizens Advice September 28, 2018; CMA response December 19, 2018.
• Financial Conduct Authority. “FCA confirms measures to protect customers from loyalty penalty in home and motor insurance markets.” May 28, 2021.

Shrinkflation (chapter 11)

• John T. Gourville and Jonathan J. Koehler. “Downsizing Price Increases: A Greater Sensitivity to Price than Quantity in Consumer Markets.” Harvard Business School working paper, 2004. Manda Mahoney, “How to Avoid a Price Increase,” HBS Working Knowledge, June 28, 2004.
• Metin Çakır and Joseph V. Balagtas. “Consumer Response to Package Downsizing: Evidence from the Chicago Ice Cream Market.” Journal of Retailing 90(1), 2014, 1–12.
• Ioannis Evangelidis. “Frontiers: Shrinkflation Aversion: When and Why Product Size Decreases Are Seen as More Unfair than Equivalent Price Increases.” Marketing Science 43(2), 2024, 280–288.
• Aljoscha Janssen and Johannes Kasinger. “Shrinkflation and Consumer Demand.” Marketing Science 45(1), 2026, 142–158.
• US Government Accountability Office. “Consumer Prices: Trends and Policy Options Related to Shrinking Product Sizes,” GAO-25-107451, July 31, 2025.
• Bird & Bird. “Shrinkflation in France: New Obligation to Inform Consumers,” 2024, on the Order of April 16, 2024 as amended June 28, 2024.
• Reuters, via GMA News. “South Korea to slap fines on food suppliers for ‘shrinkflation’.” May 4, 2024.
• Schoenherr. “Spotlight on shrinkflation: Austria’s Anti-Deceptive Packaging Law now in effect.” April 9, 2026.
• National Law Review. “Connecticut’s Proposed Shrinkflation Disclosure Law” (HB 6856), 2025.

Tariffs and fees (chapter 12)

• Supreme Court of the United States. Learning Resources, Inc. v. Trump, No. 24-1287, February 20, 2026.
• US Customs and Border Protection. Suspension of duty-free de minimis treatment, fact sheet, August 2025; interim final rule, Federal Register, June 24, 2026.
• Skadden. “Tariff Refund Mechanism Takes Shape After Supreme Court’s IEEPA Ruling.” March 24, 2026.
• Honigman. “Section 122 Tariffs Expire for Many Imports, But New Section 301 Forced-Labor Tariffs on 60 Economies Replace Them, Effective July 24, 2026.” July 24, 2026.
• Alberto Cavallo, Paola Llamas and Franco Vazquez, HBS Pricing Lab tariff tracker, reported in “Tariffs Leave Consumers and Companies Splitting the Tab,” HBS Working Knowledge, April 27, 2026.
• Mary Amiti, Sebastian Heise and David Weinstein. “The Anatomy of Tariff Pass-through into Consumer Prices.” NBER Working Paper 35561, July 2026.
• Neil Mehrotra and Michael E. Waugh. “Initially delayed, the pass-through of tariffs to consumer prices has arrived.” Federal Reserve Bank of Minneapolis, August 28, 2026.
• California Attorney General. SB 478, the Honest Pricing Law, effective July 1, 2024.
• Federal Trade Commission. Rule on Unfair or Deceptive Fees: frequently asked questions, 16 C.F.R. Part 464, effective May 12, 2025.

Saying it (chapter 13)

• CNN Money. “Netflix earnings: 800,000 U.S. subscribers lost in Q3.” October 24, 2011, quoting Netflix’s third-quarter 2011 letter to shareholders.