Publications

2022
Working Paper

Stories, Statistics and Memory

By: Thomas Graeber, Christopher Roth and Florian Zimmermann

For most decisions, we rely on information encountered over the course of days, months or years. We consume this information in various forms, including abstract summaries of multiple data points – statistics – and contextualized anecdotes about individual instances... View Details

Keywords: Decision Choices and Conditions; Information Types; Media; Cognition and Thinking

Fast Answer

Hospitals: statistics (US)

style="line-height: 20.8px;"> by AHA) Incidence & Prevalence Database - world's epidemiology data including some surgical patient volumes Centers... View Details

2015
Chapter

Optimal Process Control of Symbolic Transfer Functions

By: Christopher Griffin and Elisabeth Paulson

Transfer function modeling is a standard technique in classical Linear Time Invariant and Statistical Process Control. The work of Box and Jenkins was seminal in developing methods for identifying parameters associated with classical (r, s, k) transfer functions.... View Details

Keywords: Transfer Functions; Markov Processes; Stochastic Models; Process Control; Research; Information Technology

March 2011 (Revised April 2021)
Case

The Whiz Kids

By: Tom Nicholas and David Chen

In October 1945, Henry Ford II received a telegram in his office at the Ford Motor Company in Dearborn, Michigan written by Charles "Tex" Thornton, a U.S. Air Force colonel. The telegram presented an opportunity for Ford to deploy a system of statistical control which... View Details

Keywords: Ford Motor Company; Statistical Control; Management Systems; Accounting; Operations; Strategy; Mathematical Methods; Auto Industry; United States

Web

Charts & Statistics - Leadership

Great American Business Leaders of the 20th Century Charts & Statistics Birthplace Education Gender & Ethnicity Tenure Birthplace of Leaders Foreigners Gain CEO Access After Mid-Century Pre-1950 Founder 73% Family Business 2% Other CEO... View Details

February 1986 (Revised June 2007)
Background Note

Constructing and Using Process Control Charts

Summarizes how to construct and use statistical process control charts. Gives several examples. Discusses tolerances using control charts for debugging. View Details

Keywords: Production; Analysis

September 2017
Article

The Real Effects of Capital Controls: Firm-Level Evidence from a Policy Experiment

By: Laura Alfaro, Anusha Chari and Fabio Kanczuk

Emerging-market governments adopted capital control taxes to manage the massive surge in foreign capital inflows in the aftermath of the global financial crisis. Theory suggests that the imposition of capital controls can drive up the cost of capital and curb... View Details

Keywords: Capital Controls; Discriminatory Taxation; International Investment Barriers; Exports; Debt; Cost of Capital; Taxation; Investment; Borrowing and Debt; Equity; Brazil

September 2022
Article

Tone at the Bottom: Measuring Corporate Misconduct Risk from the Text of Employee Reviews

By: Dennis W. Campbell and Ruidi Shang

This paper examines whether information extracted via text-based statistical methods applied to employee reviews left on the website Glassdoor.com can be used to develop indicators of corporate misconduct risk. We argue that inside information on the incidence of... View Details

Keywords: Management Accounting; Management Control; Corporate Culture; Corporate Misconduct; Risk Measurement; Organizational Culture; Crime and Corruption; Risk and Uncertainty; Measurement and Metrics

January 1996 (Revised April 1997)
Case

Deutsche Allgemeinversicherung

Describes the application of statistical process control in a service industry. In this case, Annette Kluck must decide how to adopt manufacturing-based principles to a service process ranging from customer account setup to legal services. View Details

Keywords: Quality; Analysis; Service Operations; Business Strategy; Service Industry

Professor Narayanan is the Thomas D. Casserly, Jr. Professor of Business Administration, and Senior Associate Dean of Executive Education and HBS Online. His research focuses on management accounting with an interest in performance evaluation and incentives... View Details

Keywords: accounting industry; banking; service industry; telecommunications; health care

Research Summary

The Real Effects of Capital Controls: Financial Constraints, Exporters, and Firm Investment

By: Laura Alfaro

In aftermath of the global financial crisis of 2008–2009, emerging-market governments have increasingly restricted foreign capital inflows. The data show a statistically significant drop in cumulative abnormal returns for Brazilian firms following capital control... View Details

2024
Working Paper

What Is Newsworthy? Theory and Evidence

By: Luis Armona, Matthew Gentzkow, Emir Kamenica and Jesse M. Shapiro

We study newsworthiness in theory and practice. We focus on situations in which a news outlet observes the realization of a state of the world and must decide whether to report the realization to a consumer who pays an opportunity cost to consume the report. The... View Details

Keywords: News; Mathematical Methods; Prejudice and Bias; Media and Broadcasting Industry

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08 Nov 2019
HBS Seminar

Galit Eizman (Research Associate, Harvard Kennedy School) (paper joint with Alice Ruichen Wang, Renmin Univ, China), Harvard Kennedy School

Article

Risk and the Cross-Section of Stock Returns

By: Mark Seasholes, Radu Burlacu, Patrice Fontaine and Sonia Jimenez-Garces

This paper mathematically transforms unobservable rational expectation equilibrium model parameters (information precision and supply uncertainty) into a single variable that is correlated with expected returns and that can be estimated with recently observed data. Our... View Details

Keywords: Risk Premiums; Cross-sectional Asset Pricing; REE Models; Risk and Uncertainty; Asset Pricing; Investment Return

June 28, 2011
Article

Using Implementation Intentions Prompts to Enhance Influenza Vaccination Rates

By: Katherine L Milkman, John Beshears, James J. Choi, David Laibson and Brigitte C. Madrian

We evaluate the results of a field experiment designed to measure the effect of prompts to form implementation intentions on realized behavioral outcomes. The outcome of interest is influenza vaccination receipt at free on-site clinics offered by a large firm to its... View Details

Keywords: Behavioral Economics; Nudge; Libertarian Paternalism; Public Health; Flu Shot; Behavior; Consumer Behavior; Health Care and Treatment; Cognition and Thinking

Jung Koo Kang is an assistant professor in the Accounting and Management Unit. He teaches the Financial Reporting and Control course in the MBA required curriculum.

Professor Kang’s research focuses on financial technology and innovation, alternative data,... View Details

2024
Working Paper

Anytime-Valid Inference in Linear Models and Regression-Adjusted Causal Inference

By: Michael Lindon, Dae Woong Ham, Martin Tingley and Iavor I. Bojinov

Linear regression adjustment is commonly used to analyze randomized controlled experiments due to its efficiency and robustness against model misspecification. Current testing and interval estimation procedures leverage the asymptotic distribution of such estimators to... View Details

Keywords: Mathematical Methods; Analytics and Data Science

September 2017 (Revised July 2023)
Case

Adaptive Platform Trials: The Clinical Trial of the Future?

By: Ariel D. Stern and Sarah Mehta

In July 2017, Dr. Brian M. Alexander, president and CEO of the AGILE Research Foundation, was preparing to launch a new type of clinical trial—an adaptive platform trial—to study potential therapies for glioblastoma (GBM), an aggressive form of brain cancer.... View Details

Keywords: Clinical Trials; Cancer; Adaptive Platform Trials; Platform Trials; Adaptive Trials; Glioblastoma; Health; Health Care and Treatment; Health Testing and Trials; Business Strategy; Innovation Strategy; Health Industry; United States

2022
Article

Data Poisoning Attacks on Off-Policy Evaluation Methods

By: Elita Lobo, Harvineet Singh, Marek Petrik, Cynthia Rudin and Himabindu Lakkaraju

Off-policy Evaluation (OPE) methods are a crucial tool for evaluating policies in high-stakes domains such as healthcare, where exploration is often infeasible, unethical, or expensive. However, the extent to which such methods can be trusted under adversarial threats... View Details

Keywords: Analytics and Data Science; Cybersecurity; Mathematical Methods