| The price ain’t right? Hospital prices and health spending on the privately insured Z Cooper, SV Craig, M Gaynor, J Van Reenen The quarterly journal of economics 134 (1), 51-107, 2019 | 667 | 2019 |
| Does hospital competition save lives? Evidence from the English NHS patient choice reforms Z Cooper, S Gibbons, S Jones, A McGuire The Economic Journal 121 (554), F228-F260, 2011 | 638 | 2011 |
| Equity, waiting times, and NHS reforms: retrospective study ZN Cooper, A McGuire, S Jones, J Le Grand Bmj 339, 2009 | 165 | 2009 |
| Surprise! Out-of-network billing for emergency care in the United States Z Cooper, F Scott Morton, N Shekita Journal of Political Economy 128 (9), 3626-3677, 2020 | 119 | 2020 |
| Hospital prices grew substantially faster than physician prices for hospital-based care in 2007–14 Z Cooper, S Craig, M Gaynor, NJ Harish, HM Krumholz, J Van Reenen Health Affairs 38 (2), 184-189, 2019 | 94 | 2019 |
| Out-of-network emergency-physician bills—an unwelcome surprise Z Cooper, FS Morton N Engl J Med 375 (20), 1915-1918, 2016 | 82 | 2016 |
| Does competition from private surgical centres improve public hospitals' performance? Evidence from the English National Health Service Z Cooper, S Gibbons, M Skellern Journal of Public Economics 166, 63-80, 2018 | 71 | 2018 |
| Out-Of-Network Billing And Negotiated Payments For Hospital-Based Physicians: The cost impact of specialists who bill patients at out-of-network rates even though the patients … Z Cooper, H Nguyen, N Shekita, FS Morton Health Affairs 39 (1), 24-32, 2020 | 53 | 2020 |
| Are health care services shoppable? Evidence from the consumption of lower-limb MRI scans M Chernew, Z Cooper, E Larsen-Hallock, FS Morton National Bureau of Economic Research, 2018 | 52 | 2018 |
| Does hospital competition improve efficiency? An analysis of the recent market-based reforms to the English NHS Z Cooper, S Gibbons, S Jones, A McGuire Centre for Economic Performance, London School of Economics and Political …, 2010 | 51 | 2010 |
| Does competition improve public hospitals’ efficiency?: evidence from a quasi-experiment in the English National Health Service Z Cooper, S Gibbons, S Jones, A McGuire Centre for Economic Performance, London School of Economics and Political …, 2012 | 45 | 2012 |
| In defence of our research on competition in England's National Health Service N Bloom, Z Cooper, M Gaynor, S Gibbons, S Jones, A McGuire, ... The Lancet 378 (9809), 2064-2065, 2011 | 36 | 2011 |
| The price ain’t right Z Cooper, S Craig, M Gaynor, J Van Reenen Hospital prices and health spending on the privately insured, 2015 | 23 | 2015 |
| Does hospital competition improve efficiency Z Cooper, S Gibbons, S Jones, A McGuire An Analysis of the Recent Market-based Reforms to the English NHS, London …, 2010 | 23 | 2010 |
| Variation in health spending growth for the privately insured from 2007 to 2014 Z Cooper, S Craig, C Gray, M Gaynor, J Van Reenen Health Affairs 38 (2), 230-236, 2019 | 20 | 2019 |
| National trends in hospital readmission rates among medicare fee-for-service survivors of mitral valve surgery, 1999–2010 JA Dodson, Y Wang, K Murugiah, K Dharmarajan, Z Cooper, S Hashim, ... PLoS One 10 (7), e0132470, 2015 | 20 | 2015 |
| Politics and health care spending in the United States Z Cooper, AE Kowalski, EN Powell, J Wu National Bureau of Economic Research, 2017 | 18 | 2017 |
| Certificates of confidentiality in research: rationale and usage ZN Cooper, RM Nelson, LF Ross Genetic testing 8 (2), 214-220, 2004 | 17 | 2004 |
| Do Higher-Priced Hospitals Deliver Higher-Quality Care? Z Cooper, JJ Doyle Jr, JA Graves, J Gruber National Bureau of Economic Research, 2022 | 16 | 2022 |
| Politics, hospital behaviour and health care spending Z Cooper, A Kowalski, E Neff Powell, J Wu Centre for Economic Performance, London School of Economics and Political …, 2017 | 16 | 2017 |
