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2021
Working Paper

Population Interference in Panel Experiments

By: Iavor I Bojinov, Kevin Wu Han and Guillaume Basse

The phenomenon of population interference, where a treatment assigned to one experimental unit affects another experimental unit's outcome, has received considerable attention in standard randomized experiments. The complications produced by population interference in... View Details

Keywords: Finite Population; Potential Outcomes; Dynamic Causal Effects; Mathematical Methods

April 2020
Article

Designs for Estimating the Treatment Effect in Networks with Interference

By: Ravi Jagadeesan, Natesh S. Pillai and Alexander Volfovsky

In this paper, we introduce new, easily implementable designs for drawing causal inference from randomized experiments on networks with interference. Inspired by the idea of matching in observational studies, we introduce the notion of considering a treatment... View Details

Keywords: Experimental Design; Network Inference; Neyman Estimator; Symmetric Interference Model; Homophily

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January 2024
Article

Population Interference in Panel Experiments

By: Kevin Wu Han, Guillaume Basse and Iavor Bojinov

The phenomenon of population interference, where a treatment assigned to one experimental unit affects another experimental unit’s outcome, has received considerable attention in standard randomized experiments. The complications produced by population interference in... View Details

Keywords: Outcome or Result; Research; Situation or Environment

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13 Apr 2021
Working Paper Summaries

Population Interference in Panel Experiments

Keywords: by Iavor I. Bojinov, Kevin Wu Han, and Guillaume Basse

2024
Working Paper

Design of Panel Experiments with Spatial and Temporal Interference

By: Tu Ni, Iavor Bojinov and Jinglong Zhao

One of the main practical challenges companies face when running experiments (or A/B tests) over a panel is interference, the setting where one experimental unit's treatment assignment at one time period impacts another's outcomes, possibly at the following time... View Details

Keywords: Research

June 2014
Article

Building Brand Knowledge Structures: Elaboration and Interference Effects on the Processing of Sequentially Advertised Brand Benefit Claims

By: Susan E. Heckler, Kevin L. Keller, Michael J. Houston and Jill Avery

Two experiments are reported that examine the effects of an ad campaign designed to link two different benefit claims to a brand. The findings indicated that recall for a subsequently advertised claim depended on the strength of existing brand-benefit links in memory.... View Details

Keywords: Marketing Communication; Brand Building; Brand Management; Brands; Advertising; Consumer Psychology; Advertising Campaigns; Brands and Branding; Marketing Communications; Consumer Behavior; Marketing Strategy; Advertising Industry; Consumer Products Industry

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22 Oct 2020
Working Paper Summaries

Estimating Causal Effects in the Presence of Partial Interference Using Multivariate Bayesian Structural Time Series Models

Keywords: by Fiammetta Menchetti and Iavor Bojinov

Article

Memory and Representativeness

By: Pedro Bordalo, Katherine Baldiga Coffman, Nicola Gennaioli, Frederik Schwerter and Andrei Shleifer

We explore the idea that judgment by representativeness reflects the workings of episodic memory, especially interference. In a new laboratory experiment on cued recall, participants are shown two groups of images with different distributions of colors. We find that i)... View Details

Keywords: Cued Recall; Interference; Similarity; Probabilistic Judgments; Heuristics And Biases

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March 2022
Article

Estimating the Effectiveness of Permanent Price Reductions for Competing Products Using Multivariate Bayesian Structural Time Series Models

By: Fiammetta Menchetti and Iavor Bojinov

Researchers regularly use synthetic control methods for estimating causal effects when a sub-set of units receive a single persistent treatment, and the rest are unaffected by the change. In many applications, however, units not assigned to treatment are nevertheless... View Details

Keywords: Causal Inference; Partial Interference; Synthetic Controls; Bayesian Structural Time Series; Mathematical Methods

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2024
Working Paper

Empirical Guidance: Data Processing and Analysis with Applications in Stata, R, and Python

By: Melissa Ouellet and Michael W. Toffel

This paper describes a range of best practices to compile and analyze datasets, and includes some examples in Stata, R, and Python. It is meant to serve as a reference for those getting started in econometrics, and especially those seeking to conduct data analyses in... View Details

Keywords: Empirical Methods; Empirical Operations; Statistical Methods And Machine Learning; Statistical Interferences; Research Analysts; Analytics and Data Science; Mathematical Methods

03 Jun 2019
Working Paper Summaries

Memory and Representativeness

Keywords: by Pedro Bordalo, Katherine Baldiga Coffman, Nicola Gennaioli, Frederik Schwerter, and Andrei Shleifer

2017
Simulation

Global Collaboration Simulation: Tip of the Iceberg

By: Tsedal Neeley

This online simulation teaches students about the difficulties in cross-cultural communication and managing global teams. Communicating via chat, teams of 4 or 5 students race against the clock to prepare a VC presentation. Students are assigned the role of a native... View Details

Keywords: Cross-Cultural and Cross-Border Issues; Interpersonal Communication; Groups and Teams; Social and Collaborative Networks

February 2016 (Revised March 2017)
Case

Regulating Radio in the Age of Broadcasting

By: David Moss, Marc Campasano and Colin Donovan

When the Titanic tragically sank on April 15, 1912, potentially life-saving help was delayed as a result of failures in radio communication. In part as a result, Congress moved swiftly to regulate radio, passing the Radio Act of 1912 four months later. Although at... View Details

Keywords: Radio; Regulation; Communication Technology; Government Legislation; History; Media and Broadcasting Industry; United States

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

August 1974 (Revised March 1986)
Case

Architects Collaborative, Inc.

Although internationally recognized for quality design, the collaborative's billings have been on a plateau for four years and they are losing jobs to architects with sophisticated marketing practices. The main issue is how marketing can be integrated into a design... View Details

Keywords: Design; Marketing Strategy; Creativity; Service Industry

February 2013 (Revised March 2015)
Case

The LEGO Group: Publish or Protect?

By: Willy C. Shih and Sen Chai

Senior managers at the LEGO Group are faced with a quandary: Should they patent inventions coming out of their manufacturing process development work, should they keep them as trade secrets, or should they publish them so that they would go into the public domain and... View Details

June 2013 (Revised February 2016)
Teaching Note

The LEGO Group: Publish or Protect?

Senior managers at the LEGO Group are faced with a quandary: Should they patent inventions coming out of their manufacturing process development work, should they keep them as trade secrets, or should they publish them so that they would go into the public domain and... View Details

Keywords: Intellectual Property Management; Spillovers; Intellectual Property; Patents; Knowledge Dissemination; Manufacturing Industry; Europe

March 2020
Article

The Politics of M&A Antitrust

By: Mihir N. Mehta, Suraj Srinivasan and Wanli Zhao

Antitrust regulators play a critical role in protecting market competition. We examine whether firms can use the political process to opportunistically influence antitrust reviews of corporate merger transactions. We exploit the fact that in some mergers, acquirers... View Details

Keywords: Political Economy; Antitrust; FTC; DOJ; Mergers and Acquisitions; Government and Politics; Power and Influence

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January 2014 (Revised May 2014)
Background Note

Rail Transportation in the United States

By: Rosabeth Moss Kanter and Matthew Guilford

In the 20th century, automobiles and airlines pushed rail into the background as an often-troubled and neglected mode. After a review of the long history of rail in the U.S., this paper examines the situation in the 21st century, including the rail market structure,... View Details

Keywords: Railroad History; History; Rail Transportation; Rail Industry

April 2000 (Revised July 2000)
Case

Ameritrade Holding Corporation

By: Lisa K. Meulbroek

Some of the senior managers at Ameritrade, an Internet brokerage firm, are selling their holdings in the firm. Why are the managers selling, how will it affect shareholders, and what should the CEO do about it? The CEO is concerned that the market will interpret... View Details

Keywords: Valuation; Internet and the Web; Stock Options; Risk Management; Financial Services Industry

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