Publications

2016
Working Paper

Reviews, Reputation, and Revenue: The Case of Yelp.com

By: Michael Luca

Do online consumer reviews affect restaurant demand? I investigate this question using a novel dataset combining reviews from the website Yelp.com and restaurant data from the Washington State Department of Revenue. Because Yelp prominently displays a restaurant's... View Details

Keywords: Revenue; Network Effects; Reputation; Social and Collaborative Networks; Food and Beverage Industry; Service Industry; Washington (state, US)

SSRN

2016
Working Paper

Saving More in Groups: Field Experimental Evidence from Chile

By: Felipe Kast, Stephan Meier and Dina Pomeranz

We test the impact of a peer group savings program on precautionary savings through two randomized field experiments among 2,687 microcredit clients. The first experiment finds that the Peer Group Treatment, which combines public goal setting, monitoring in the group,... View Details

Keywords: Saving; Decision Making; Interest Rates; Planning; Performance Effectiveness; Economics; Entrepreneurship; Growth and Development; Social Enterprise; Global Range; Chile

2021
Book

Sales Management That Works: How to Sell in a World That Never Stops Changing

By: Frank V. Cespedes

Selling is changing, but the impact on sales of megatrends like ecommerce, big data, and AI is often misunderstood and not supported by empirical data. Managers who fail to separate fact from hype will make decisions based on bad assumptions and, in a competitive... View Details

Keywords: Sales; Strategy; Salesforce Management; Change; Adaptation

Article

Investor Sentiment in the Stock Market

By: Malcolm Baker and Jeffrey Wurgler

We examine how investor sentiment affects the cross-section of stock returns. Theory predicts that a broad wave of sentiment will disproportionately affect stocks whose valuations are highly subjective and are difficult to arbitrage. We test this prediction by... View Details

Keywords: Financial Markets; Stocks; Investment Return; Valuation; Forecasting and Prediction; Volatility; Price; Risk and Uncertainty; Behavioral Finance

Find at Harvard

2014
Other Teaching and Training Material

Marketing Reading: Segmentation and Targeting

By: Sunil Gupta

This Reading introduces two of the integral parts of any marketing strategy: segmentation and targeting. It covers, first, all of the methods, techniques, and variables with which a business first uncovers the full range of its potential customers and then... View Details

Keywords: Behavioral Segmentation; Conjoint Analysis; Demographic Segmentation; Geographic Segmentation; Market Opportunities; Market Segmentation; Marketing; Marketing Strategy; Psychographic Segmentation; Unethical Marketing Practices; United States

08 Jan 2014
News

Study: Fight Performance Anxiety by Getting Excited

22 Nov 2019
News

Reasoning behind a veil of ignorance

11 Aug 2018
News

Religious shoppers less likely to be tempted to overspend

06 Sep 2017
News

Amid Wreckage Of Hurricane Harvey, Countless Acts Of Heroism

17 Apr 2017
Video

HBS Startup Bootcamp

2007
Book

Mergers: Leadership, Performance & Corporate Health

By: David G. Fubini, Colin Price and Maurizio Zollo

Drawing on their own extensive integration experience, the systematic analysis of 167 mergers, and cutting edge academic research, the authors of this book identify the common leadership challenges to be tackled for the achievement of what we call 'corporate health',... View Details

Keywords: Corporate Health; Mergers and Acquisitions; Leadership; Organizational Change and Adaptation; Success

Find at Harvard

2024
Working Paper

Incrementality Representation Learning: Synergizing Past Experiments for Intervention Personalization

By: Ta-Wei Huang, Eva Ascarza and Ayelet Israeli

This paper introduces Incrementality Representation Learning (IRL), a novel multitask representation learning framework that predicts heterogeneous causal effects of marketing interventions. By leveraging past experiments, IRL efficiently designs and targets... View Details

Keywords: Heterogeneous Treatment Effect; Multi-task Learning; Representation Learning; Personalization; Promotion; Deep Learning; Field Experiments; Customer Focus and Relationships; Customization and Personalization

SSRN

February 2021
Tutorial

T-tests: Theory and Practice

By: Michael Parzen, Natalie Epstein, Chiara Farronato and Michael Toffel

This video provides an introduction to hypothesis testing, sampling, t-tests, and p-values. It provides examples of A/B testing and t-testing to assess whether difference between two groups are statistically significant. This video can be assigned in conjunction with... View Details

Keywords: Data Analysis; Data Analytics; Experiment Design; Experimentation; Analytics and Data Science; Analysis

November 2006
Case

Tickle

By: William A. Sahlman and Dan Heath

Describes a set of decisions confronting the management team of a rapidly growing online psychological testing and social networking company. They can either sell the company to a large public company, raise another round of capital from a preeminent venture capital... View Details

Keywords: Decisions; Internet and the Web; Growth Management; Internet and the Web; Business Strategy; Corporate Finance

Educators