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Second-Best Pricing for the US Postal Service. Roger Sherman and Anthony George. Presented by Ian Fetters. US Postal Service operates under economies of scale Marginal cost pricing deficits Postal Reorganization Act [1970]
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Second-Best Pricing for the US Postal Service Roger Sherman and Anthony George Presented by Ian Fetters
US Postal Service operates under economies of scale • Marginal cost pricing deficits • Postal Reorganization Act [1970] • Organized Postal Service, formerly Post Office Department into corporation • Goal: to break even – given budget constraint • How should the USPS price?
Conditions • Economies of scale, so MC pricing deficit • Budget constraint limits deficit • Some services have substitutive or complementary relationships with private sector services
Previous models • Ramsey, Boiteux – framework for second-best models • Davis/Whinston, Baumol/Bradford, Lerner – models assuming no public/private sector interactions • Mohring – considers cross-price elasticities in public sector, but not private sector • Bergson – considers cross-price elasticities, but no budget constraint
Assumptions • No intermediate goods • No interdependencies between goods • Private firms do not respond to public sector prices
Derivation of price Utility function Subject to income constraint Demand function
Derivation of price Seek to maximize welfare Constraints: incomes and costs equal, Firm only earns B
Derivation of price Substitute for optimal price Solve for derivation from MC in terms of elasticity
Implications • If Ekj = 0, then optimal pricing a la Baumol/Bradford • If Ekj =/= 0 among public sector services, then situation similar to Mohring • If Ekj =/= 0 between public/private sector services, then situation similar to Bergson
Implications • As budget constraint is more important, α 1, price further from MC, substitute/complementary services more important • If private service tends to be complement to public, public service will be cheaper than if ignoring complemancy
Implications • USPS estimates MCs very low • α approaches 1, influence of private sector less important • Others estimate MC of USPS higher • α approaches 0, must consider private sector when pricing in public sector • Estimates of MC increase over time