Dr. Sean Ennis
Selected Research Summaries
Optimal Prices and Costs for Hospitals with Excess Bed Capacity
SUMMARY: This paper explores the impact of hospital overcapacity on determining optimal costs and prices, focusing on the case of Medicare and Medicaid. The study develops a novel methodology for incorporating excess capacity into the estimation of hospital cost functions, notably distinguishing between short-run and long-run marginal costs. The empirical results suggest that accounting for overcapacity significantly influences the assessment of reimbursement adequacy, highlighting the need for rigorous cost specification to inform hospital reimbursement policies.
KEY WORDS: Excess hospital capacity, marginal costs for hospitals, translog cost function, short-run marginal costs, long-run marginal costs
State Aid and Privatisation
SUMMARY: This paper analyzes the relationship between competition and international long distance calling prices in the United States between 1994 and 1998. Increased competition is on average associated with lower rates for consumers, even after considering the role of lower telecommunications costs. Both low-priced flagship rate plans and higher-priced basic plans are considered. Surprisingly, the study finds that competition impacts each differently and tends to increase price dispersion.
KEY WORDS: Price discrimination, telecom competition, international calling
Rationales for International Cooperation in Merger Enforcement
SUMMARY: This paper analyzes the relationship between competition and international long distance calling prices in the United States between 1994 and 1998. Increased competition is on average associated with lower rates for consumers, even after considering the role of lower telecommunications costs. Both low-priced flagship rate plans and higher-priced basic plans are considered. Surprisingly, the study finds that competition impacts each differently and tends to increase price dispersion.
KEY WORDS: Price discrimination, telecom competition, international calling
Personalised Pricing and Disclosure
SUMMARY: This paper analyzes the relationship between competition and international long distance calling prices in the United States between 1994 and 1998. Increased competition is on average associated with lower rates for consumers, even after considering the role of lower telecommunications costs. Both low-priced flagship rate plans and higher-priced basic plans are considered. Surprisingly, the study finds that competition impacts each differently and tends to increase price dispersion.
KEY WORDS: Price discrimination, telecom competition, international calling
Mergers in Network Industries
SUMMARY: This paper explores the impact of hospital overcapacity on determining optimal costs and prices, focusing on the case of Medicare and Medicaid. The study develops a novel methodology for incorporating excess capacity into the estimation of hospital cost functions, notably distinguishing between short-run and long-run marginal costs. The empirical results suggest that accounting for overcapacity significantly influences the assessment of reimbursement adequacy, highlighting the need for rigorous cost specification to inform hospital reimbursement policies.
KEY WORDS: Excess hospital capacity, marginal costs for hospitals, translog cost function, short-run marginal costs, long-run marginal costs
Competition and Efficiency in Payment Cards
SUMMARY: This paper explores the impact of hospital overcapacity on determining optimal costs and prices, focusing on the case of Medicare and Medicaid. The study develops a novel methodology for incorporating excess capacity into the estimation of hospital cost functions, notably distinguishing between short-run and long-run marginal costs. The empirical results suggest that accounting for overcapacity significantly influences the assessment of reimbursement adequacy, highlighting the need for rigorous cost specification to inform hospital reimbursement policies.
KEY WORDS: Excess hospital capacity, marginal costs for hospitals, translog cost function, short-run marginal costs, long-run marginal costs
Does Increasing Concentration Hit Poorer Areas More? A Study of Retail Petroleum Markets
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Physician Incentives and the Timing of Caesarean Sections: Impacts of Contractual Form
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Competition and Price Discrimination: International Calling
SUMMARY: This paper analyzes the relationship between competition and international long distance calling prices from the United States between 1994 and 1998. Increased competition is on average associated with lower rates for consumers, even after considering the role of lower telecommunications costs. Both low-priced flagship rate plans and higher-priced basic plans are considered. Surprisingly, the study finds that competition impacts each differently and is associated with higher price dispersion, with basic plan prices increasing while flagship plan prices decrease.
KEY WORDS: Price discrimination, telecom competition, international calling, price dispersion
Market Power and Wealth Distribution
SUMMARY: This paper analyzes the relationship between competition and international long distance calling prices in the United States between 1994 and 1998. Increased competition is on average associated with lower rates for consumers, even after considering the role of lower telecommunications costs. Both low-priced flagship rate plans and higher-priced basic plans are considered. Surprisingly, the study finds that competition impacts each differently and tends to increase price dispersion.
KEY WORDS: Price discrimination, telecom competition, international calling
Initiatives in Reforming Rules and Regulations
SUMMARY: This paper analyzes the relationship between competition and international long distance calling prices in the United States between 1994 and 1998. Increased competition is on average associated with lower rates for consumers, even after considering the role of lower telecommunications costs. Both low-priced flagship rate plans and higher-priced basic plans are considered. Surprisingly, the study finds that competition impacts each differently and tends to increase price dispersion.
KEY WORDS: Price discrimination, telecom competition, international calling
Competition and Innovation in Digital Markets
SUMMARY: This paper explores the impact of hospital overcapacity on determining optimal costs and prices, focusing on the case of Medicare and Medicaid. The study develops a novel methodology for incorporating excess capacity into the estimation of hospital cost functions, notably distinguishing between short-run and long-run marginal costs. The empirical results suggest that accounting for overcapacity significantly influences the assessment of reimbursement adequacy, highlighting the need for rigorous cost specification to inform hospital reimbursement policies.
KEY WORDS: Excess hospital capacity, marginal costs for hospitals, translog cost function, short-run marginal costs, long-run marginal costs
Price Parity Clauses for Hotel Room Booking: Empirical Evidence from Regulatory Change
SUMMARY: This paper explores the impact of hospital overcapacity on determining optimal costs and prices, focusing on the case of Medicare and Medicaid. The study develops a novel methodology for incorporating excess capacity into the estimation of hospital cost functions, notably distinguishing between short-run and long-run marginal costs. The empirical results suggest that accounting for overcapacity significantly influences the assessment of reimbursement adequacy, highlighting the need for rigorous cost specification to inform hospital reimbursement policies.
KEY WORDS: Excess hospital capacity, marginal costs for hospitals, translog cost function, short-run marginal costs, long-run marginal costs
Inequality: A Hidden Cost of Market Power
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Global Value Chain Entry and Exit and SMEs’ Environmental Practices: Examining the Role of Trade Facilitation
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Business Strategy and Antitrust Compliance
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