Publications

December 2014
Article

The Discipline of Business Experimentation

By: Stefan Thomke and Jim Manzi

The data you already have can't tell you how customers will react to innovations. To discover if a truly novel concept will succeed, you must subject it to a rigorous experiment. In most companies, tests do not adhere to scientific and statistical principles. As a... View Details

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April 2007 (Revised October 2007)
Background Note

An Overview of Project Finance & Infrastructure Finance - 2006 Update

By: Benjamin C. Esty and Aldo Sesia

Provides an introduction to the fields of project finance and infrastructure finance, and gives a statistical overview of project-financed investments over the years from 2002 to 2006. Examples of project-financed investments include the $4 billion Chad-Cameroon... View Details

Keywords: Project Finance; Infrastructure; Investment; Projects; Trends

Educators

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Forthcoming
Article

How Important Is Editorial Gatekeeping? Evidence from Top Biomedical Journals

By: Joshua L. Krieger, Kyle R. Myers and Ariel D. Stern

We examine editors' influence on the scientific content of academic journals by unpacking the role of three major forces: journals' missions, aggregate supply of and demand for specific topics, and scientific homophily via editorial gatekeeping. In a sample of top... View Details

Keywords: Editors; Biomedical Research; Editorial Gatekeeping; Scientific Homophily; Intellectual Capital; Mission and Purpose; Journals and Magazines; Intellectual Property; Innovation and Invention; Human Capital; Higher Education; Publishing Industry

May 2021
Article

Fifty Shades of QE: Comparing Findings of Central Bankers and Academics

By: Brian Fabo, Marina Jančoková, Elisabeth Kempf and Ľuboš Pástor

We compare the findings of central bank researchers and academic economists regarding the macroeconomic effects of quantitative easing (QE). We find that central bank papers find QE to be more effective than academic papers do. Central bank papers report larger effects... View Details

Keywords: Quantitative Easing; Career Concerns; Economic Research; Central Banking; Macroeconomics; Economic Growth

2012
Working Paper

Average Marginal Income Tax Rates in New Zealand, 1907-2009

By: Debasis Bandyopadhyay, Robert J. Barro, Jeremy Couchman, Norman Gemmell, Gordon Y Liao and Fiona McAlister

Estimates of marginal tax rates (MTRs) faced by individual economic agents, and for various aggregates of taxpayers, are important for economists testing behavioural responses to changes in those tax rates. This paper reports estimates of a number of personal marginal... View Details

Keywords: Average Marginal Income Tax Rates; New Zealand; Taxation; New Zealand

SSRN

We use oil price fluctuations to test the impact of transfers from wealthy OPEC nations to their poorer Muslim allies. The instrument identifies plausibly exogenous variation in foreign aid. We investigate how aid is spent by tracking its short-run effect on... View Details

08 May 2025
HBS Seminar

Ramesh Johari, Stanford

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

Article

Are Online and Offline Prices Similar? Evidence from Large Multi-Channel Retailers

By: Alberto Cavallo

Online prices are increasingly used for measurement and research applications, yet little is known about their relation to prices in physical stores, where most retail transactions occur. I conduct the first large-scale comparison of prices simultaneously collected... View Details

Keywords: Online Prices; Offline Prices; Multi-channel Retailers; Price; Internet and the Web; Measurement and Metrics; Retail Industry

Article

Portfolio Value-at-Risk Optimization for Asymmetrically Distributed Asset Returns

By: Joel Goh, Kian Guan Lim, Melvyn Sim and Weina Zhang

We propose a new approach to portfolio optimization by separating asset return distributions into positive and negative half-spaces. The approach minimizes a newly-defined Partitioned Value-at-Risk (PVaR) risk measure by using half-space statistical information. Using... View Details

Keywords: Robust Optimization; Portfolio Management; Value-at-risk; Mathematical Methods; Finance

Purchase

2009
Article

Adverse Selection in Online 'Trust' Certifications

By: Benjamin Edelman

Widely used online "trust" authorities issue certifications without substantial verification of recipients' actual trustworthiness. This lax approach gives rise to adverse selection: the sites that seek and obtain trust certifications are actually less trustworthy than... View Details

Keywords: Online Technology; Web Sites; Trust; Governance Compliance; Value; Complexity

08 Nov 2019
HBS Seminar

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

2012
Other Unpublished Work

Lost in the Clouds: The Impact of Copyright Scope on Investment in Cloud Computing Ventures

By: Josh Lerner and Greg Rafert

Our analysis seeks to understand the impact of changes in copyright scope on investment in new firms. We begin by analyzing the investment effects of the Cartoon Network, et al. v. Cablevision decision in the U.S. and court rulings in France and Germany on venture... View Details

Keywords: Technological Innovation; Venture Capital; Internet and the Web; Investment; Business Startups; Copyright; France; Germany; United States; European Union

July 2009
Article

How Is Foreign Aid Spent? Evidence from a Natural Experiment

By: Eric D. Werker, Faisal Z. Ahmed and Charles Cohen

We use oil price fluctuations to test the impact of transfers from wealthy OPEC nations to their poorer Muslim allies. The instrument identifies plausibly exogenous variation in foreign aid. We investigate how aid is spent by tracking its short-run effect on aggregate... View Details

Keywords: Foreign Aid; Money

29 Apr 2012
News

American Recovery?

01 Nov 2019
News

The Particular Creativity of Dense Urban Neighborhoods

Research Summary

Clusters and Competition

By: Michael E. Porter

Porter is conducting ongoing research on the theory of clusters, or geographic concentrations of interconnected companies and institutions in a particular field. This work includes further development of cluster theory and its implications for management and public... View Details

2015
Working Paper

Lost in the Clouds: The Impact of Changing Property Rights on Investment in Cloud Computing Ventures

By: Josh Lerner and Greg Rafert

Our analysis seeks to understand the impact of changing allocations of property rights on investment in new firms. We focus on the Cartoon Network, et al. v. Cablevision decision in the U.S., which narrowed the protection enjoyed by content creators (e.g., movie... View Details

Keywords: Technological Innovation; Venture Capital; Internet and the Web; Entrepreneurship; Investment; Copyright

Article

Entry into Platform-based Markets

By: Feng Zhu and Marco Iansiti

This paper examines the relative importance of platform quality, indirect network effects, and consumer expectations on the success of entrants in platform-based markets. We develop a theoretical model and find that an entrant's success depends on the strength of... View Details

Keywords: Platform-based Markets; Winnter-take-all; First-mover Advantage; Indirect Network Effects; Video Game Industry; Quality; Network Effects; Market Entry and Exit; Digital Platforms; Motion Pictures and Video Industry