Publications
Publications
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- All HBS Web
(323)
- Faculty Publications (82)
- January 2019
- Article
Bubbles for Fama
By: Robin Greenwood, Andrei Shleifer and Yang You
We evaluate Eugene Fama's claim that stock prices do not exhibit price bubbles. Based on U.S. industry returns 1926–2014 and international sector returns 1985–2014, we present four findings: (1) Fama is correct in that a sharp price increase of an industry portfolio... View Details
Keywords: Bubble; Market Efficiency; Predictability; Price Bubble; Stocks; Price; Forecasting and Prediction
- June 2018 (Revised April 2021)
- Case
Valuing Snap After the IPO Quiet Period (A)
By: Marco Di Maggio, Benjamin C. Esty and Gregory Saldutte
Snap, the disappearing message app, went public at $17 per share on March 2, 2017, making its two 20-something founders the youngest self-made billionaires in the country. Over the next three weeks, 14 analysts made investment recommendations on Snap: two with buy... View Details
Keywords: Sell-side Analysts; Underwriters; Investment Banking; Social Network; Discounted Cash Flow; Cost Of Capital; Conflicts Of Interest; Corporate Governance; Advertising; Quiet Period; ＂DCF Valuation,＂; Business Startups; Digital Marketing; Initial Public Offering; Information Infrastructure; Valuation; Venture Capital; Forecasting and Prediction; Social Media; Advertising Industry; Entertainment and Recreation Industry; Web Services Industry; United States; California
- 2025
- Working Paper
Government-Brokerage Analysts and Market Stabilization: Evidence from China
By: Sheng Cao, Xianjie He, Charles C.Y. Wang and Huifang Yin
We show analysts at government-controlled brokerage firms serve as a market stabilization tool
in China. Using earnings forecasts from 2005–2019, we find government-brokerage analysts
issue relatively more optimistic—yet less accurate and timely—forecasts during... View Details
- March 2017 (Revised March 2022)
- Case
Flashion: Art vs. Science in Fashion Retailing
By: Kris Ferreira and Karim R. Lakhani
Kate Wilson, retail analytics manager at Flashion, a fashion flash-sale site, is tasked with developing analytics to optimize pricing for first-exposure products on the site. Many in the industry have relied on years of experience and intuition to determine pricing—can... View Details
- January 2017
- Article
Being Surprised by the Unsurprising: Earnings Seasonality and Stock Returns
By: Tom Y. Chang, Samuel M. Hartzmark, David H. Solomon and Eugene F. Soltes
We present evidence consistent with markets failing to properly price information in seasonal earnings patterns. Firms with historically larger earnings in one quarter of the year (“positive seasonality quarters”) have higher returns when those earnings are usually... View Details
- November 2016 (Revised April 2018)
- Case
reMarkable: e-Writing the Future
By: Elie Ofek and Curtis Hsu
Magnus Wanberg is the creator of reMarkable, a breakthrough e-writer device set apart from similar products on the market by having solved the frustrating “slow ink” problem typically experienced on pen-based electronic devices, thus providing a “pen and paper” like... View Details
Keywords: Entrepreneurial Marketing; Innovation Management; Go To Market Strategy; Marketing Plan; Target Market; Digital Devices; Consumer Electronics; Forecasting; Information Technology; Marketing Strategy; Innovation and Management; Marketing Channels; Entrepreneurship; Forecasting and Prediction; Product Marketing; Product Development; Electronics Industry
- Winter 2016
- Article
Analytics for an Online Retailer: Demand Forecasting and Price Optimization
By: Kris J. Ferreira, Bin Hong Alex Lee and David Simchi-Levi
We present our work with an online retailer, Rue La La, as an example of how a retailer can use its wealth of data to optimize pricing decisions on a daily basis. Rue La La is in the online fashion sample sales industry, where they offer extremely limited-time... View Details
- 2015
- Working Paper
The Probability of Rare Disasters: Estimation and Implications
By: Emil Siriwardane
I analyze a rare disasters economy that yields a measure of the risk neutral probability of a macroeconomic disaster, p*t. A large panel of options data provides strong evidence that p*t is the single factor driving option-implied jump risk measures in the cross... View Details
- 2019
- Working Paper
The Wisdom of Crowds in Operations: Forecasting Using Prediction Markets
By: Achal Bassamboo, Ruomeng Cui and Antonio Moreno
Prediction is an important activity in various business processes, but it becomes difficult when historical information is not available, such as forecasting demand of a new product. One approach that can be applied in such situations is to crowdsource opinions from... View Details
- Article
Waves in Ship Prices and Investment
By: Robin Greenwood and Samuel G. Hanson
We study the link between investment boom and bust cycles and returns on capital in the dry bulk shipping industry. We show that high current ship earnings are associated with high used ship prices and heightened industry investment in new ships, but forecast low... View Details
- June 2013
- Article
Issuer Quality and Corporate Bond Returns
By: Robin Greenwood and Samuel G. Hanson
We show that the credit quality of corporate debt issuers deteriorates during credit booms, and that this deterioration forecasts low excess returns to corporate bondholders. The key insight is that changes in the pricing of credit risk disproportionately affect the... View Details
- May 2012
- Article
Complicated Firms
By: Lauren Cohen and Dong Lou
We exploit a novel setting in which the same piece of information affects two sets of firms: one set of firms requires straightforward processing to update prices, while the other set requires more complicated analyses to incorporate the same piece of information into... View Details
- March 2012 (Revised October 2012)
- Case
Hayman Capital Management
By: Robin Greenwood, Julie Messina and Jared Dourdeville
In late December 2011, Hayman Capital founder and portfolio manager Kyle Bass was reviewing Japanese government budget projections for 2012. The projections appeared contrary to Hayman Capital's views on Japan, where the fund had built a bearish position. Japan had the... View Details
- December 2011
- Article
Stock Price Fragility
By: Robin Greenwood and David Thesmar
We investigate the relationship between ownership structure of financial assets and non-fundamental risk. We define an asset to be fragile if it is susceptible to non-fundamental trading shocks. An asset can be fragile because of concentrated ownership or because its... View Details
- July – August 2011
- Article
What Factors Drive Analyst Forecasts?
A firm's competitive environment, its strategic choices, and its internal capabilities are considered important determinants of its future performance. Yet there is little evidence on whether analysts' forecasts of firm performance actually reflect any of these factors... View Details
- 2012
- Working Paper
Issuer Quality and Corporate Bond Returns
By: Robin Greenwood and Samuel G. Hanson
We show that the credit quality of corporate debt issuers deteriorates during credit booms, and that this deterioration forecasts low excess returns to corporate bondholders. The key insight is that changes in the pricing of credit risk disproportionately affect the... View Details
- 2010
- Other Unpublished Work
Share Issuance and Factor Timing
By: Robin Greenwood and Samuel Hanson
We show that characteristics of stock issuers can be used to forecast important common factors in stocks returns such as those associated with book-to-market, size, and industry. Specifically, we use differences between the attributes of stock issuers and repurchasers... View Details
- November 2010 (Revised May 2014)
- Case
Dow's Bid for Rohm and Haas
By: Benjamin C. Esty and David Lane
This case analyzes Dow Chemical Company's proposed acquisition of Rohm and Haas in 2008. The $18.8 billion acquisition was part of Dow's strategic transformation from a slow-growth, low-margin, and cyclical producer of basic chemicals into a higher-growth,... View Details
- 2014
- Working Paper
Financing Risk and Innovation
By: Ramana Nanda and Matthew Rhodes-Kropf
We provide a model of investment into new ventures that demonstrates why some places, times, and industries should be associated with a greater degree of experimentation by investors. Investors respond to financing risk―a forecast of limited future funding―by modifying... View Details
- July 2010 (Revised December 2011)
- Background Note
Marketing Analysis Toolkit: Pricing and Profitability Analysis
By: Thomas J. Steenburgh and Jill Avery
Pricing is one of the most difficult decisions marketers make and the one with the most direct and immediate impact on the firm's financial position. This toolkit will introduce the fundamental terminology and calculations associated with pricing and profitability... View Details