Publications

June, 2021
Article

Learning from Deregulation: The Asymmetric Impact of Lockdown and Reopening on Risky Behavior During COVID-19

By: Edward L. Glaeser, Ginger Zhe Jin, Benjamin T. Leyden and Michael Luca

During the COVID-19 pandemic, states issued and then rescinded stay-at-home orders that restricted mobility. We develop a model of learning by deregulation, which predicts that lifting stay-at-home orders can signal that going out has become safer. Using restaurant... View Details

Keywords: COVID-19; Lockdown; Reopening; Impact; Coronavirus; Public Health Measures; Mobility; Health Pandemics; Governing Rules, Regulations, and Reforms; Consumer Behavior

January 23, 2023
Article

Digital Public Health Interventions at Scale: The Impact of Social Media Advertising on Beliefs and Outcomes Related to COVID Vaccines

By: Susan Athey, Kristen Grabarz, Michael Luca and Nils Wernerfelt

Public health organizations increasingly use social media advertising campaigns in pursuit of public health goals. In this paper, we evaluate the impact of about $40 million of social media advertisements that were run and experimentally tested on Facebook and... View Details

Keywords: COVID-19 Pandemic; Public Health; Vaccines; Social Media; Advertising; Power and Influence; Health Care and Treatment

13 Apr 2020
Research & Ideas

Small Businesses Are Worse Off Than We Thought

Business School. “They need to cut expenses to the bone to ride out this crisis.” Stanton worked with HBS colleagues Michael Luca and Zoe Cullen; Harvard University economics... View Details

Keywords: by Kristen Senz; Financial Services

2018
Working Paper

Survival of the Fittest: The Impact of the Minimum Wage on Firm Exit

By: Dara Lee Luca and Michael Luca

We study the impact of the minimum wage on firm exit in the restaurant industry, exploiting recent changes in the minimum wage at the city level. We find that the impact of the minimum wage depends on whether a restaurant was already close to the margin of exit.... View Details

Keywords: Wages; Business Exit or Shutdown; Food and Beverage Industry

SSRN

2023
Working Paper

The Benefits of Revealing Race: Evidence from Minority-owned Local Businesses

By: Abhay Aneja, Michael Luca and Oren Reshef

Is there latent demand to support Black-owned businesses? To explore, we analyze a new feature that made it easier to identify Black-owned restaurants on a large online platform. We find that labeling restaurants as “Black-owned” increased customer engagement and... View Details

Keywords: Black-owned Businesses; Race; Prejudice and Bias; Ownership; Knowledge Dissemination; Digital Platforms; Consumer Behavior; Food and Beverage Industry

SSRN

24 Jan 2017
First Look

First Look at New Research: January 24, 2017

Yoshimi Anzai, Marta E. Heilbrun, Derek Haas, Luca Boi, Kirk Moshre, Satoshi Minoshima, and Vivian S. Lee Abstract—The lack of understanding the true costs (not charges) of... View Details

Keywords: Sean Silverthorne

13 Mar 2018
First Look

March 13, 2018

Download working paper: https://www.hbs.edu/faculty/Pages/item.aspx?num=54145 Digitizing Disclosure: The Case of Restaurant Hygiene Scores By: Dai, Weijia (Daisy), and Michael View Details

Keywords: Sean Silverthorne

March 2015 (Revised January 2020)
Case

Behavioural Insights Team (A)

By: Michael Luca and Patrick Rooney

The Behavioural Insights Team case introduces students to the concept of choice architecture and the value of experimental methods (sometimes called A/B testing) within organizational contexts. The exercise provides an opportunity for students to apply these principles... View Details

Keywords: Behavioral Economics; Experiments; Choice Architecture; Public Entrepreneurship; Decision Choices and Conditions; Consumer Behavior; Taxation; Economics; Public Administration Industry; United Kingdom

Educators

17 Sep 2013
First Look

First Look: September 17

Government Inspections: Evidence from Restaurant Hygiene Inspections and Online Reviews By: Kang, Jun Seok, Polina Kuznetsova, Yejin Choi, and Michael View Details

Keywords: Sean Silverthorne

2018
Working Paper

Measuring Gentrification: Using Yelp Data to Quantify Neighborhood Change

By: Edward L. Glaeser, Hyunjin Kim and Michael Luca

We demonstrate that data from digital platforms such as Yelp have the potential to improve our understanding of gentrification, both by providing data in close to real time (i.e., nowcasting and forecasting) and by providing additional context about how the local... View Details

Keywords: Geographic Location; Local Range; Transition; Analytics and Data Science; Measurement and Metrics; Forecasting and Prediction

September 2018
Article

Aggregation of Consumer Ratings: An Application to Yelp.com

By: Weijia Dai, Ginger Jin, Jungmin Lee and Michael Luca

Because consumer reviews leverage the wisdom of the crowd, the way in which they are aggregated is a central decision faced by platforms. We explore this "rating aggregation problem" and offer a structural approach to solving it, allowing for (1) reviewers to vary in... View Details

Keywords: User Generated Content; Crowdsourcing; Yelp; Social and Collaborative Networks; Information; Internet and the Web; Learning; Mathematical Methods; E-commerce

October 14, 2019
Article

Designing Better Online Review Systems

By: Geoff Donaker, Hyunjin Kim and Michael Luca

Online reviews are transforming the way consumers choose products and services of all sorts. We turn to TripAdvisor to plan a vacation, Zocdoc to find a doctor, and Yelp to choose a new restaurant. Reviews can create value for buyers and sellers alike, but only if they... View Details

Keywords: Reviews; Internet and the Web; Design; Quality; Reputation

Register to Read

26 Jan 2016
First Look

January 26, 2016

worker productivity by using data from two important applications—police hiring and teacher tenure decisions. Publisher's link: https://www.hbs.edu/faculty/Pages/item.aspx?num=50430 December 2015 Current... View Details

Keywords: Sean Silverthorne

Article

Crowdsourcing City Government: Using Tournaments to Improve Inspection Accuracy

By: Edward Glaeser, Andrew Hillis, Scott Duke Kominers and Michael Luca

The proliferation of big data makes it possible to better target city services like hygiene inspections, but city governments rarely have the in-house talent needed for developing prediction algorithms. Cities could hire consultants, but a cheaper alternative is to... View Details

Keywords: User-generated Content; Operations; Tournaments; Policy-making; Machine Learning; Online Platforms; Analytics and Data Science; Mathematical Methods; City; Infrastructure; Business Processes; Government and Politics

November, 2016
Article

Fixing Discrimination in Online Marketplaces

By: Ray Fisman and Michael Luca

Online marketplaces such as eBay, Uber, and Airbnb have the potential to reduce racial, gender, and other forms of bias that affect the off-line world. And in the early days of Internet commerce, the relative anonymity of transactions did make it harder for... View Details

Keywords: Prejudice and Bias; Digital Platforms; Internet and the Web; Race; Gender

Register to Read

February 2023 (Revised March 2024)
Supplement

Shanty Real Estate: Teaching Note Supplement

By: Michael Luca and Jesse M. Shapiro

Shanty is a simulation in which students inhabit the role of either a traditional home buyer or an iBuyer, both bidding on the same condo. The traditional home buyer has access to a “comp sheet” of similar properties that have recently sold, and has done a walkthrough.... View Details

Keywords: Decision Choices and Conditions; Decision Making; Measurement and Metrics; Market Timing

March 2015 (Revised January 2020)
Supplement

Behavioural Insights Team (B)

By: Michael Luca and Patrick Rooney

The Behavioural Insights Team case introduces students to the concept of choice architecture and the value of experimental methods (sometimes called A/B testing) within organizational contexts. The exercise provides an opportunity for students to apply these principles... View Details

Keywords: Behavioral Economics; Experiments; Choice Architecture; Public Entrepreneurship; United Kingdom

May 2020
Article

Digitizing Disclosure: The Case of Restaurant Hygiene Scores

By: Weijia (Daisy) Dai and Michael Luca

Collaborating with Yelp and the city of San Francisco, we revisit a canonical example of quality disclosure by evaluating and helping to redesign the posting of restaurant hygiene scores on Yelp.com. We implement a two-stage intervention that separately identifies... View Details

Keywords: Corporate Disclosure; Consumer Behavior; Knowledge Dissemination; Food and Beverage Industry