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- Article
How Much Should We Trust Staggered Difference-In-Differences Estimates?
By: Andrew C. Baker, David F. Larcker and Charles C.Y. Wang
We explain when and how staggered difference-in-differences regression estimators, commonly applied to assess the impact of policy changes, are biased. These biases are likely to be relevant for a large portion of research settings in finance, accounting, and law that... View Details
Keywords: Difference In Differences; Staggered Difference-in-differences Designs; Generalized Difference-in-differences; Dynamic Treatment Effects; Mathematical Methods
Baker, Andrew C., David F. Larcker, and Charles C.Y. Wang. "How Much Should We Trust Staggered Difference-In-Differences Estimates?" Journal of Financial Economics 144, no. 2 (May 2022): 370–395. (Editor's Choice, May 2022; Jensen Prize, First Place, June 2023.)
- 2021
- Working Paper
How Much Should We Trust Staggered Difference-In-Differences Estimates?
By: Andrew C. Baker, David F. Larcker and Charles C.Y. Wang
Difference-in-differences analysis with staggered treatment timing is frequently used to assess the impact of policy changes on corporate outcomes in academic research. However, recent advances in econometric theory show that such designs are likely to be biased in the... View Details
Keywords: Difference In Differences; Staggered Difference-in-differences Designs; Generalized Difference-in-differences; Dynamic Treatment Effects; Mathematical Methods
Baker, Andrew C., David F. Larcker, and Charles C.Y. Wang. "How Much Should We Trust Staggered Difference-In-Differences Estimates?" European Corporate Governance Institute Finance Working Paper, No. 736/2021, February 2021. (Harvard Business School Working Paper, No. 21-112, April 2021.)
- May–June 2015
- Article
Television Advertising and Online Shopping
By: Jura Liaukonyte, Thales Teixeira and Kenneth Wilbur
Media multitasking competes with television advertising for consumers' attention, but it also may facilitate immediate and measurable response to some advertisements. This paper explores whether and how television advertising influences online shopping. We construct a... View Details
Keywords: Content Analysis; Difference-in-differences; Internet; Media Multitasking; Online Purchases; Advertising; Advertising Industry; United States
Liaukonyte, Jura, Thales Teixeira, and Kenneth Wilbur. "Television Advertising and Online Shopping." Marketing Science 34, no. 3 (May–June 2015): 311–330.
- November–December 2022
- Article
The Value of Descriptive Analytics: Evidence from Online Retailers
By: Ron Berman and Ayelet Israeli
Does the adoption of descriptive analytics impact online retailer performance, and if so, how? We use the synthetic difference-in-differences method to analyze the staggered adoption of a retail analytics dashboard by more than 1,500 e-commerce websites, and we find an... View Details
Keywords: Descriptive Analytics; Big Data; Synthetic Control; E-commerce; Online Retail; Difference-in-differences; Martech; Internet and the Web; Analytics and Data Science; Performance; Marketing; Retail Industry
Berman, Ron, and Ayelet Israeli. "The Value of Descriptive Analytics: Evidence from Online Retailers." Marketing Science 41, no. 6 (November–December 2022): 1074–1096.
- 2021
- Working Paper
The Value of Descriptive Analytics: Evidence from Online Retailers
By: Ron Berman and Ayelet Israeli
Does the adoption of descriptive analytics impact online retailer performance, and if so, how? We use the synthetic difference-in-differences method to analyze the staggered adoption of a retail analytics dashboard by more than 1,500 e-commerce websites, and we find an... View Details
Keywords: Descriptive Analytics; Big Data; Synthetic Control; E-commerce; Online Retail; Difference-in-differences; Martech; Internet and the Web; Analytics and Data Science; Performance; Retail Industry
Berman, Ron, and Ayelet Israeli. "The Value of Descriptive Analytics: Evidence from Online Retailers." Harvard Business School Working Paper, No. 21-067, November 2020. (Revised December 2021. Accepted at Marketing Science.)
- Awards
Journal of Financial Economics. Jensen Prize. First Place
First Place Winner of the 2023 Jensen Prize for the best corporate finance paper published in the Journal of Financial Economics for “How Much Should We Trust Staggered Difference-In-Differences Estimates?” (May 2022) with Andrew Baker and David F. Larcker. View Details
- 2024
- Working Paper
Antitrust Platform Regulation and Entrepreneurship: Evidence from China
By: Ke Rong, D. Daniel Sokol, Di Zhou and Feng Zhu
Many jurisdictions have launched antitrust enforcement and brought in regulation of large tech platforms. The swift and strict implementation of China’s Anti-Monopoly Guidelines for the Platform Economy (Platform Guidelines) provides a quasi-natural experiment... View Details
Keywords: Governing Rules, Regulations, and Reforms; Competition; Venture Capital; Market Entry and Exit; Supply and Industry; China
Rong, Ke, D. Daniel Sokol, Di Zhou, and Feng Zhu. "Antitrust Platform Regulation and Entrepreneurship: Evidence from China." Harvard Business School Working Paper, No. 24-039, January 2024.
- 2016
- Working Paper
Intellectual Property Rights Protection, Ownership, and Innovation: Evidence from China
By: Lily Fang, Josh Lerner and Chaopeng Wu
Using a difference-in-difference approach, we study how intellectual property right (IPR) protection affects innovation in China in the years around the privatizations of state-owned enterprises (SOEs). Innovation increases after SOE privatizations, and this increase... View Details
Fang, Lily, Josh Lerner, and Chaopeng Wu. "Intellectual Property Rights Protection, Ownership, and Innovation: Evidence from China." NBER Working Paper Series, No. 22685, September 2016.
- July 2017
- Article
Intellectual Property Rights Protection, Ownership, and Innovation: Evidence from China
By: Lily Fang, Josh Lerner and Chaopeng Wu
Using a difference-in-difference approach, we study how intellectual property right (IPR) protection affects innovation in China in the years around the privatizations of state-owned enterprises (SOEs). Innovation increases after SOE privatizations, and this increase... View Details
Keywords: Patents; Privatization; State Ownership; Trademarks; Copyright; Innovation and Invention; China
Fang, Lily, Josh Lerner, and Chaopeng Wu. "Intellectual Property Rights Protection, Ownership, and Innovation: Evidence from China." Review of Financial Studies 30, no. 7 (July 2017): 2446–2477.
- 2024
- Article
Technological Adoption and Taxation: The Case of China's Golden Tax Reform
By: Haichao Fan, Yu Liu, Nancy Qian and Jaya Y. Wen
This paper investigates the effect of Phase 2 of the Golden Tax Project on VAT in China. The reform introduced computer-generated invoices and electronic transaction linking. Using a difference-in-differences strategy, we show that the reform increased VAT by reducing... View Details
Keywords: Taxation; Governing Rules, Regulations, and Reforms; Technological Innovation; Economic Growth; China
Fan, Haichao, Yu Liu, Nancy Qian, and Jaya Y. Wen. "Technological Adoption and Taxation: The Case of China's Golden Tax Reform." Tax Policy and the Economy 38 (2024): 101–122.
- May 2022
- Article
When Does Product Liability Risk Chill Innovation? Evidence from Medical Implants
By: Alberto Galasso and Hong Luo
Liability laws designed to compensate for harms caused by defective products may also affect innovation. We examine this issue by exploiting a major quasi-exogenous increase in liability risk faced by U.S. suppliers of polymers used to manufacture medical implants.... View Details
Keywords: Product Liability; Innovation; Tort; Medical Devices; Vertical Foreclosure; Product; Innovation and Invention; Legal Liability; Laws and Statutes; Medical Devices and Supplies Industry
Galasso, Alberto, and Hong Luo. "When Does Product Liability Risk Chill Innovation? Evidence from Medical Implants." American Economic Journal: Economic Policy 14, no. 2 (May 2022): 366–401.
- January 2022
- Article
Why is Corporate Virtue in the Eye of The Beholder? The Case of ESG Ratings
By: Dane Christensen, George Serafeim and Anywhere Sikochi
Despite the rising use of environmental, social, and governance (ESG) ratings, there is substantial disagreement across rating agencies regarding what rating to give to individual firms. As what drives this disagreement is unclear, we examine whether a firm’s ESG... View Details
Keywords: ESG Ratings; Rating Agency Disagreement; ESG Disclosure; Corporate Social Responsibility; Sustainability; Corporate Social Responsibility and Impact; Environmental Sustainability; Corporate Disclosure
Christensen, Dane, George Serafeim, and Anywhere Sikochi. "Why Is Corporate Virtue in the Eye of the Beholder? The Case of ESG Ratings." Accounting Review 97, no. 1 (January 2022): 147–175.
- 2023
- Working Paper
Market Exclusivity and Innovation: Evidence From Antibiotics
By: Edward Kong and Olivia Zhao
The US incentivizes drug innovation via patents as well as market exclusivity periods awarded by the US Food and Drug Administration. We estimate the causal effects of extending market exclusivity for an important drug class: antibiotics. Using a... View Details
Keywords: Health Testing and Trials; Innovation and Invention; Motivation and Incentives; Government Administration; Government Legislation; Pharmaceutical Industry; United States
Kong, Edward, and Olivia Zhao. "Market Exclusivity and Innovation: Evidence From Antibiotics." Working Paper, December 2023.
- January 2020
- Article
The Long-Run Dynamics of Electricity Demand: Evidence from Municipal Aggregation
By: Tatyana Deryugina, Alexander MacKay and Julian Reif
We study the dynamics of residential electricity demand by exploiting a natural experiment that produced large and long-lasting price changes in over 250 Illinois communities. Using a flexible difference-in-differences matching approach, we estimate that the price... View Details
Keywords: Electricity Demand; Consumption Dynamics; Energy; Policy; Demand and Consumers; Price; Mathematical Methods
Deryugina, Tatyana, Alexander MacKay, and Julian Reif. "The Long-Run Dynamics of Electricity Demand: Evidence from Municipal Aggregation." American Economic Journal: Applied Economics 12, no. 1 (January 2020): 86–114.
- Summer 2023
- Article
Do Policies to Increase Access to Treatment for Opioid Use Disorder Work?
By: Eric Barrette, Leemore S. Dafny and Karen Shen
Even among commercially insured individuals, opioid use disorder is undertreated in the United States: nearly half receive no treatment within six months of a new diagnosis. Using a difference-in-differences specification exploiting the extension of insurance parity... View Details
Keywords: Opioid Treatment; Medication-assisted Treatment; Substance Use Disorder; Private Insurance; Insurance; Health Care and Treatment
Barrette, Eric, Leemore S. Dafny, and Karen Shen. "Do Policies to Increase Access to Treatment for Opioid Use Disorder Work?" American Journal of Health Economics 9, no. 3 (Summer 2023): 297–330.
- 2023
- Working Paper
Segmented Going-Public Markets and the Demand for SPACs
By: Angela Ma, Miles Zheng and Jessica Bai
We provide a regulatory-arbitrage-based explanation for the origin and proliferation of the Special Purpose Acquisition Company (SPAC). SPAC sponsors act as non-bank intermediaries, and the SPAC market structure appeals to yield-seeking investors and riskier,... View Details
Keywords: Special Purpose Acquisition Companies; Non-bank Intermediaries; Regulatory Arbitrage; Adverse Selection; Initial Public Offering
Ma, Angela, Miles Zheng, and Jessica Bai. "Segmented Going-Public Markets and the Demand for SPACs." Working Paper, 2023.
- June 2017
- Article
The Political Economy of Financial Innovation: Evidence from Local Governments
By: Christophe Pérignon and Boris Vallée
We examine the toxic loans sold by investment banks to local governments. Using proprietary data, we show that politicians strategically use these products to increase chances of being re-elected. Consistent with greater incentives to hide the cost of debt, toxic loans... View Details
Pérignon, Christophe, and Boris Vallée. "The Political Economy of Financial Innovation: Evidence from Local Governments." Review of Financial Studies 30, no. 6 (June 2017): 1903–1934.
- November 2023
- Article
Brokerage House Initial Public Offerings and Analyst Forecast Quality
By: Mark Bradshaw, Michael Drake, Joseph Pacelli and Brady Twedt
We examine how brokerage firm initial public offerings (IPOs) influence the research quality of sell-side analysts employed by the brokerage. Our main results focus on earnings forecast bias and absolute forecast errors as proxies for research quality. Using a... View Details
Keywords: IPOs; Research Analysts; ＂Brokerage Industry; Initial Public Offering; Employees; Behavior; Outcome or Result
Bradshaw, Mark, Michael Drake, Joseph Pacelli, and Brady Twedt. "Brokerage House Initial Public Offerings and Analyst Forecast Quality." Management Science 69, no. 11 (November 2023): 7079–7094.
- 2023
- Working Paper
Healthcare Provider Bankruptcies
By: Samuel Antill, Jessica Bai, Ashvin Gandhi and Adrienne Sabety
Healthcare firms are increasingly filing for Chapter 11 bankruptcy. Using two strategies, we show causal evidence that bankruptcies harm patients through increased worker turnover. First, in an online experiment, experienced nurses assess hypothetical employers and... View Details
Keywords: Insolvency and Bankruptcy; Health Care and Treatment; Outcome or Result; Retention; Health Industry
Antill, Samuel, Jessica Bai, Ashvin Gandhi, and Adrienne Sabety. "Healthcare Provider Bankruptcies." Working Paper, November 2023.