Sara Fisher Ellison
Biographic Data
| ID | 1471401 |
|---|---|
| NAME | Sara Fisher Ellison |
| GIVEN NAMES | Sara Fisher |
| FAMILY NAME | Ellison |
| SIGNATURE | ELLISON S F |
| AFFILIATIONS | Senior Lecturer in Economics at the Massachusetts Institute of Technology, Cambridge, Massachusetts. |
| VERIFIED | No |
| TOTAL WORKS | 4 |
| TOTAL CITATIONS | 4 |
| AUTHOR COUNT | 4 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2005 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 2 |
Match Quality, Search, and the Internet Market for Used Books
This article examines effects of internet search technologies on match‐quality markets. A model in which sellers of unusual objects wait for high‐value buyers illustrates how more efficient search may simultaneously increase price levels, price dispersion, and social welfare. A reduced‐form analysis of the used‐book market finds support for several nuanced model predictions. Estimates from a novel structural framework indicate the shift to online…
An Economist's Guide to Epidemiology Models of Infectious Disease
We describe the structure and use of epidemiology models of disease transmission, with an emphasis on the susceptible/infected/recovered (SIR) model. We discuss high-profile forecasts of cases and deaths that have been based on these models, what went wrong with the early forecasts, and how they have adapted to the current COVID pandemic. We also offer three distinct areas where economists would be well positioned to contribute to or inform this …
Costs of Managerial Attention and Activity as a Source of Sticky Prices: Structural Estimates from an Online Market
We study price dynamics for computer components sold on a price-comparison website. Our fine-grained data-a year of hourly price data for scores of rival retailers-allow us to estimate a dynamic model of competition, backing out structural estimates of managerial frictions. The estimated frictions are substantial, concentrated in the act of monitoring market conditions rather than entering a new price. We use our model to simulate the counterfact…
Lessons About Markets from the Internet
any of us have grown used to, tired of, and finally downright skeptical of claims of the transformative powers of the Internet. It was to usher in the New Economy, but we seem mostly to have the Old. It would transform retail, but Toys 'R' Us has outlasted EToys. Frictionless commerce would be the norm, but plenty of friction still exists
An Economist's Guide to Epidemiology Models of Infectious Disease
We describe the structure and use of epidemiology models of disease transmission, with an emphasis on the susceptible/infected/recovered (SIR) model. We discuss high-profile forecasts of cases and deaths that have been based on these models, what went wrong with the early forecasts, and how they have adapted to the current COVID pandemic. We also offer three distinct areas where economists would be well positioned to contribute to or inform this …
Lessons About Markets from the Internet
any of us have grown used to, tired of, and finally downright skeptical of claims of the transformative powers of the Internet. It was to usher in the New Economy, but we seem mostly to have the Old. It would transform retail, but Toys 'R' Us has outlasted EToys. Frictionless commerce would be the norm, but plenty of friction still exists
Lessons About Markets from the Internet
any of us have grown used to, tired of, and finally downright skeptical of claims of the transformative powers of the Internet. It was to usher in the New Economy, but we seem mostly to have the Old. It would transform retail, but Toys 'R' Us has outlasted EToys. Frictionless commerce would be the norm, but plenty of friction still exists
Costs of Managerial Attention and Activity as a Source of Sticky Prices: Structural Estimates from an Online Market
We study price dynamics for computer components sold on a price-comparison website. Our fine-grained data-a year of hourly price data for scores of rival retailers-allow us to estimate a dynamic model of competition, backing out structural estimates of managerial frictions. The estimated frictions are substantial, concentrated in the act of monitoring market conditions rather than entering a new price. We use our model to simulate the counterfact…
An Economist's Guide to Epidemiology Models of Infectious Disease
We describe the structure and use of epidemiology models of disease transmission, with an emphasis on the susceptible/infected/recovered (SIR) model. We discuss high-profile forecasts of cases and deaths that have been based on these models, what went wrong with the early forecasts, and how they have adapted to the current COVID pandemic. We also offer three distinct areas where economists would be well positioned to contribute to or inform this …
Match Quality, Search, and the Internet Market for Used Books
This article examines effects of internet search technologies on match‐quality markets. A model in which sellers of unusual objects wait for high‐value buyers illustrates how more efficient search may simultaneously increase price levels, price dispersion, and social welfare. A reduced‐form analysis of the used‐book market finds support for several nuanced model predictions. Estimates from a novel structural framework indicate the shift to online…
Economics (4 works) · Business (3 works) · Consumer Market Behavior and Pricing (3 works) · Computer Science (2 works) · Econometrics (2 works) · The Internet (2 works) · World Wide Web (2 works) · Advertising (1 works) · Agricultural risk and resilience (1 works) · COVID-19 epidemiological studies (1 works)