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- 2023
- Working Paper
Design-Based Confidence Sequences: A General Approach to Risk Mitigation in Online Experimentation
By: Dae Woong Ham, Michael Lindon, Martin Tingley and Iavor I. Bojinov
Randomized experiments have become the standard method for companies to evaluate the performance of new products or services. In addition to augmenting managers’ decision-making, experimentation mitigates risk by limiting the proportion of customers exposed to...
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- May 2022
- Article
Variance Analysis: New Insights from Health Care Applications
By: Robert S. Kaplan and Susanna Gallani
We use a health care application to illustrate how variance analysis can be used to benchmark costs across similar service delivery sites. Variances for personnel costs, typically the largest cost component in service organizations, are calculated for price, quantity,...
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- 2021
- Chapter
Digital Infrastructure
By: Shane Greenstein
What determines the supply of innovative digital infrastructure and how does variance in supply shape the performance of digital services? The essay reviews research into the economic impact of deployment, innovation, and adoption of digital infrastructure. It...
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Keywords:
Information Technology;
Infrastructure;
Economics;
Policy;
Research;
Analysis;
United States
- March 2021
- Article
The Customer May Not Always Be Right: Customer Compatibility and Service Performance
This paper investigates the impact of customer compatibility – the degree of fit between the needs of customers and the capabilities of the operations serving them – on customer experiences and firm performance. We use a variance decomposition analysis to quantify the...
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- Article
Are Cost Advantages from a Modern Indian Hospital Transferable to the United States?
By: R. S. Kaplan, F. Erhun, V.G. Narayanan, B. Mistry and K. Brayton, et al
We use time-driven activity-based costing to estimate the cost of personnel and space for an elective coronary artery bypass graft (CABG) surgery at two U.S. hospitals, Intermountain and Baylor Heart, and Narayana Health (NH), in India. All three hospitals use modern...
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- Fall 2017
- Article
An Empirical Analysis of Investment Return Dispersion in Emerging Markets Private Equity
By: Josh Lerner and Mark Baker
The authors use transaction-level data to compare the dispersion of private equity (PE) returns in emerging markets (EMs) to the same in developed markets (DMs). They regress within-market absolute deviation from the mean on an EM indicator and controls. They find...
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- November 2016 (Revised April 2018)
- Case
Darby's Investment in Sirma: Professionalizing an Entrepreneurial Firm
By: Suraj Srinivasan and Eren Kuzucu
In March 2010, Burak Dalgın (HBS MBA 2004) led private equity firm Darby's investment in Sırma, a local Turkish water and beverage company. Sırma was owned and managed by members of two Turkish business families. The existing management, while being highly...
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- October 2016 (Revised December 2016)
- Module Note
Strategy Execution Module 6: Evaluating Strategic Profit Performance
By: Robert Simons
This module reading demonstrates how to calculate and analyze the profit generated by different business strategies. Formulas and examples are provided to calculate profit generated by changes in market share, revenue growth, efficiency improvements, and support costs....
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- October 2016 (Revised March 2022)
- Background Note
Cost Variance Analysis
By: Robert S. Kaplan and Susanna Gallani
This note was written to provide students with fundamental concepts and methods for the analysis of cost variances. It focuses on the decomposition of cost variances into price, quantity, and mix variance components, an approach that allows students to identify the...
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Keywords:
Cost Accounting
- September 2016 (Revised October 2018)
- Case
Springfield Hospital
By: Susanna Gallani and Robert Kaplan
One of the key roles of costing systems is to support the evaluation of performance and facilitate appropriate resource allocations. Through participation in a comparative cost study, management at Springfield Hospital, known for its heavy focus on operational...
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- 2019
- Working Paper
The Customer May Not Always Be Right: Customer Compatibility and Service Performance
This paper investigates the impact of customer compatibility – the degree of fit between the needs of customers and the capabilities of the operations serving them – on customer experiences and firm performance. We use a variance decomposition analysis to quantify the...
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- Article
Time-driven Activity-based Costing of Multivessel Coronary Artery Bypass Grafting across National Boundaries to Identify Improvement Opportunities: Study Protocol
By: F. Erhun, B. Mistry, T. Platcheck, A. Milstein, V.G. Narayanan and R. S. Kaplan
Coronary artery bypass graft (CABG) surgery is a common treatment for coronary artery disease—a disease that affects over 10% of US adults and is a major cause of morbidity and mortality. In 2005, the mean cost for a CABG procedure among Medicare beneficiaries in the...
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- 2014
- Working Paper
The Organizational and Geographic Drivers of Absorptive Capacity: An Empirical Analysis of Pharmaceutical R&D Laboratories
By: Francesca Lazzeri and Gary P. Pisano
Scholars and practitioners alike now recognize that a firm's capacity to assimilate and use know-how from external sources—what Cohen and Levinthal (1990) called "absorptive capacity"—plays a central role in innovation performance. In recent years, a common strategy...
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- January 2013
- Case
Luotang Power: Variances Explained
By: Robert Simons and Craig Chapman
The general manager of Luotang Power, a coal-fired power plant located in central China, reviews annual results before a meeting with the board of directors. He thought the company performed well during the year and both plant availability and fuel economy had improved...
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- January 2013 (Revised March 2017)
- Teaching Note
Luotang Power: Variances Explained (Brief Case)
By: Robert Simons and Craig Chapman
The primary objective is to explore the concepts of variance analysis in performance from one year to the next and the predictability of contracting counterparts to extract value from contract positions where they can. The general manager of a coal-fired power plant...
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- September 2009
- Article
A Detailed Analysis of the Reduction Mammaplasty Learning Curve: A Statistical Process Model for Approaching Surgical Performance Improvement
By: Matthew Carty MD, Rodney Chan, Robert S. Huckman, Daniel C. Snow and Dennis Orgill
Background: The increased focus on quality and efficiency improvement within academic surgery has met with variable success among plastic surgeons. Traditional surgical performance metrics, such as morbidity and mortality, are insufficient to improve the... View Details
- March 2009
- Article
Applicant and Examiner Citations in U.S. Patents: An Overview and Analysis
By: Juan Alcacer, Michelle Gittelman and Bhaven Sampat
Prior art patent citations have become a popular measure of patent quality and knowledge flow between firms. Interpreting these measurements is complicated, in some cases, because prior art citations are added by patent examiners as well as by patent applicants. The...
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- 2008
- Working Paper
Applicant and Examiner Citations in U.S. Patents: An Overview and Analysis
By: Juan Alcacer, Michelle Gittelman and Bhaven Sampat
Researchers studying innovation increasingly use indicators based on patent citations. However, it is well known that not all citations originate from applicants—patent examiners contribute to citations listed in issued patents—and that this could complicate...
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- Other Article
What Do We Know About Variance in Accounting Profitability?
By: Anita M. McGahan and Michael E. Porter
In this paper, we analyze the variance of accounting profitability among a broad cross-section of firms in the American economy from 1981 to 1994. The purpose of the analysis is to identify the importance of year, industry, corporate-parent, and business-specific...
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- October 2000 (Revised March 2004)
- Background Note
Variance Analysis and Flexible Budgeting
By: Robert S. Kaplan
Facilitates the teaching of cases on variance analysis and flexible budgeting. Uses algebra, diagrams, and numerical examples to illustrate the calculation of price, quantity, and mix variances for revenues and costs, and a flexible budget for analyzing indirect and...
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