Authors

CPP Co-Director
Rachel is Research Director and Professor at the University of Manchester. She was made a Dame for services to economic policy and education in 2021.

Research Fellow London School of Economics
Philippe is an IFS Research Fellow, a Professor of Economics at LSE, at the College de France and at INSEAD, and a Fellow at the Econometric Society.

Peter Howitt
Journal article details
- Publisher
- American Economic Association
- Issue
- May 2006
Suggested citation
Aghion, P., Griffith, R., and Howitt, P. (2006), 'Vertical integration and competition'
More from IFS
Understand this issue

Spring Budget 2024: What you need to know
7 March 2024

How can we make government more productive?
How can the public sector do more with less? We explore productivity trends, government reform and lessons from private sector innovation.
3 December 2024

If you can’t see it, you can’t be it: role models influence female junior doctors’ choice of medical specialty
24 April 2024
Policy analysis

How can policy boost productivity growth?
At this policy conference, four panels of experts gave their perspectives and recommendations on four key areas of the UK’s productivity problem.

How do the last five years measure up on levelling up?
How well – or badly – has the UK fared on the 12 levelling up missions? We examine early progress and the scale of the challenge ahead.
19 June 2024

The Conservatives and the Economy, 2010–24
3 June 2024
Academic research

Market concentration and productivity: evidence from the UK
We measure product market concentration and business dynamism in the UK from 1997 to 2020 and study the relationship with productivity.
6 May 2025

Firm heterogeneity and the impact of payroll taxes
24 November 2022

Job ladder, human capital, and the cost of job loss
13 December 2022