Publications

April 2008
Article

A New Approach to Measuring Technology with an Application to the Shape of Diffusion Curves

By: Diego Comin, Bart Hobijn and Emilie Rovito

This paper documents the sources and measures of the cross-country historical adoption technology (CHAT) data set that covers the diffusion of about 115 technologies in over 150 countries over the last 200 years. We use this comprehensive data set to explore the shape... View Details

Keywords: Cross-Cultural and Cross-Border Issues; Measurement and Metrics; Technology Adoption; Logistics; Knowledge Dissemination

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2007
Chapter

Effects of Pseudo-Lensing and Pseudo-Dispersion in Curved Radiation Shields and Collimators: Effects on Measurements

By: Mike Horia Teodorescu

2022
Working Paper

The Fed and the Secular Decline in Interest Rates

By: Sebastian Hillenbrand

In this paper I document a striking fact: a narrow window around Fed meetings fully captures the secular decline in U.S. Treasury yields since 1980. By contrast, yield movements outside this window are transitory and wash out over time. This is surprising because the... View Details

Keywords: United States Treasury; Monetary Policy; Yield Curve; Central Banking; Interest Rates; Valuation

SSRN

Article

New Hope for the Expectations Hypothesis of the Term Structure of Interest Rates

By: K. A. Froot

Keywords: Rational Expectations; Yield Curve; Interest Rates; Asset Pricing; Behavioral Finance

August 2013 (Revised November 2020)
Case

Tesla Motors

By: Eric Van den Steen

In mid-2013, Tesla Motors was riding a wave of success: It had launched its first really mass-produced car—the model S—to rave reviews; had recently raised first-year production targets; and had started taking orders for its next car, the Model X. Tesla seemed to be on... View Details

Keywords: Barriers To Entry; Economic Analysis; Learning Curve; Economies Of Scale; Innovation; Market Entry; Sustainable Competitive Advantage; Vision; Strategy And Leadership; Strategy; Competitive Strategy; Market Entry and Exit; Competitive Advantage; Technological Innovation; Leadership; Learning; Economics; Analysis; Auto Industry

November 2013 (Revised August 2015)
Case

Janet Yellen and the Bernanke Fed

By: Matthew Weinzierl and Katrina Flanagan

The unelected Federal Reserve Chairman exerts exceptional influence over the U.S., in fact global, economy. As Janet Yellen prepared to take over the position, she would look back on Chairman Bernanke's tenure during the Great Recession. During that time, Bernanke was... View Details

Keywords: Monetary Policy; Nominal Rigidity And Aggregate Demand/Aggregate Supply; Phillips Curve; Taylor Rule; Central Bank Independence; Central Banking; Money; Policy; Financial Crisis; Power and Influence; Banking Industry; Public Administration Industry; United States

January 2021
Article

Machine Learning for Pattern Discovery in Management Research

By: Prithwiraj Choudhury, Ryan Allen and Michael G. Endres

Supervised machine learning (ML) methods are a powerful toolkit for discovering robust patterns in quantitative data. The patterns identified by ML could be used for exploratory inductive or abductive research, or for post-hoc analysis of regression results to detect... View Details

Keywords: Machine Learning; Supervised Machine Learning; Induction; Abduction; Exploratory Data Analysis; Pattern Discovery; Decision Trees; Random Forests; Neural Networks; ROC Curve; Confusion Matrix; Partial Dependence Plots; AI and Machine Learning

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April 2020
Article

Field Comparisons of Incentive-Compatible Preference Elicitation Techniques

By: Shawn A. Cole, A. Nilesh Fernando, Daniel Stein and Jeremy Tobacman

Knowledge of consumer demand is important for firms, policy makers, and economists. One common tool for incentive-compatible demand elicitation, the Becker-DeGroot-Marschak (BDM) mechanism, has been widely used in laboratory settings but rarely evaluated for... View Details

Keywords: Incentive-compatible Elicitation; Experimental Methods; Weather Insurance; Rainfall Insurance; Agricultural Extension; Demand and Consumers

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September 1989
Background Note

Performance Curves: Costs, Prices, and Value

By: Robert J. Dolan and Benson P. Shapiro

Explains the concept of a family of performance curves. The most well known is the price/performance curve relating the prices of items in a product line to their performance. Also discusses the cost/performance curve and its impact on product positioning, product line... View Details

Keywords: Cost vs Benefits; Price; Product Positioning; Performance; Competition; Value

October 2016 (Revised January 2017)
Background Note

The U.S. Health Club Industry, 2005–2016

By: John R. Wells and Gabriel Ellsworth

In 2015, the U.S. health-club industry generated revenues of $25.8 billion, up from $14.8 billion in 2004. Members of health clubs accounted for 17% of the population, up from 14%. The number of clubs had grown from 26,830 in 2004 to 36,180. In the process, the list of... View Details

13 Jun 2005
Research & Ideas

From Turf Wars to Learning Curves: How Hospitals Adopt New Technology

influential…, PTCA has been used less frequently than in hospitals with less influential surgeons." And even if PTCA and other innovations make it past initial gatekeepers, it's a long road to adoption because of learning curves... View Details

Keywords: by Sara Grant; Health

February 2007
Article

The Persistence of Inflation Versus that of Real Marginal Cost in the New Keynesian Model

By: Julio J. Rotemberg

This note provides an example where the New Keynesian Phillips Curve leads inflation to be substantially more persistent than the output gap. View Details

Keywords: Macroeconomics; Inflation and Deflation; Cost

November 2004 (Revised September 2019)
Background Note

The U.S. Health Club Industry in 2004

By: John R. Wells, Gabriel Ellsworth and Benjamin Weinstock

In 2004, the $16.8 billion U.S. health club industry continued its strong record of growth. There were almost 27,000 health clubs in the United States, up from 6,700 two decades earlier, and these clubs claimed 41 million members, over 14% of the U.S. population.... View Details

Keywords: Health Clubs; Fitness; Gyms; Chain; Weight Loss; Obesity; Exercise; Personal Training; Bally Total Fitness; 24 Hour Fitness; YMCA; Gold's Gym; Curves; Franchise; Franchising; Subscription; Promotional Sales; Promotions; Fixed Costs; Body; Accrual Accounting; Revenue Recognition; Buildings and Facilities; Business Growth and Maturation; Business Model; For-Profit Firms; Trends; Customers; Demographics; Age; Income; Private Equity; Financing and Loans; Profit; Revenue; Geographic Scope; Multinational Firms and Management; Health; Nutrition; Business History; Employees; Retention; Human Capital; Working Conditions; Contracts; Business or Company Management; Goals and Objectives; Growth and Development Strategy; Markets; Demand and Consumers; Supply and Industry; Industry Growth; Industry Structures; Operations; Service Operations; Franchise Ownership; Private Ownership; Public Ownership; Problems and Challenges; Sales; Salesforce Management; Situation or Environment; Opportunities; Nonprofit Organizations; Welfare; Sports; Strategy; Business Strategy; Competition; Competitive Strategy; Consolidation; Corporate Strategy; Customization and Personalization; Expansion; Segmentation; Hardware; Health Industry; United States

August 2020 (Revised September 2020)
Technical Note

Assessing Prediction Accuracy of Machine Learning Models

By: Michael W. Toffel, Natalie Epstein, Kris Ferreira and Yael Grushka-Cockayne

The note introduces a variety of methods to assess the accuracy of machine learning prediction models. The note begins by briefly introducing machine learning, overfitting, training versus test datasets, and cross validation. The following accuracy metrics and tools... View Details

Keywords: Machine Learning; Statistics; Econometric Analyses; Experimental Methods; Data Analysis; Data Analytics; Forecasting and Prediction; Analytics and Data Science; Analysis; Mathematical Methods