Daniel (Danny) Ralph

Professor of Operations Research

Academic Director of the Centre for Risk Studies (CRS)

Director of Studies in Management Studies and Fellow of Churchill College

BSc (University of Melbourne), MS, PhD (University of Wisconsin)

My research interests include management of systemic and emerging risks, business decision making, risk aversion in electricity markets, methods and models for optimisation problems and equilibrium systems. I’m a member of the Australian Mathematical Society, INFORMS and the Mathematical Optimization Society.

I’m part of the Operations and Technology Management subject group at Cambridge Judge Business School, which focuses on practice-based research through partner organisations to address a wide spectrum of management challenges.

Daniel (Danny) Ralph.

Professional experience

Professor Ralph is a member of the Australian Mathematical Society, INFORMS and the Mathematical Optimization Society. He is Area Editor for Environment, Energy and Sustainability at Operations Research. He was Editor-in-Chief of Mathematical Programming (Series B) from 2007-2013 and has served on the editorial boards of Mathematics of Operations Research and the SIAM Journal on Optimization, as well as the SIAM-MPS book series on optimisation.

Previous appointments

Following post-doctoral research at Cornell University, Professor Ralph was Lecturer and then Senior Lecturer at the University of Melbourne in Australia.

Publications

Selected publications

Journal articles

Special issues of journals

Books, monographs, reports and case studies

  • Tuveson, M., Ralph, D. and Alexander, K. (eds.) (2020) Beyond bad apples: risk culture in business. Cambridge: Cambridge University Press.
  • Eberhard, A., Hill, R., Ralph, D. and Glover, B.M. (1999) Progress in optimization: contributions from Australasia. Dordrecht: Kluwer Academic Publishers.
  • Luo, Z.-Q., Pang, J.-S. and Ralph, D. (1996) Mathematical programs with equilibrium constraints. Cambridge: Cambridge University Press.

Book chapters

  • Tuveson, M., Ralph, D. and Alexander, K. (2020) “Conclusion.” In: Tuveson, M., Ralph, D. and Alexander, K. (eds.) Beyond bad apples: risk culture in business. Cambridge: Cambridge University Press, pp.271-275 (DOI: 10.1017/9781316996959.010)
  • Tuveson, M. and Ralph, D. (2020) “A network view of tone at the top and the role of opinion leaders.” In: Tuveson, M., Ralph, D. and Alexander, K. (eds.) Beyond bad apples: risk culture in business. Cambridge: Cambridge University Press, pp.73-102 (DOI: 10.1017/9781316996959.004)
  • Tuveson, M., Ralph, D. and Alexander, K. (2020) “Introduction.” In: Tuveson, M., Ralph, D. and Alexander, K. (eds.) Beyond bad apples: risk culture in business. Cambridge: Cambridge University Press, pp.1-18 (DOI: 10.1017/9781316996959.001)
  • Jiang, H. and Ralph, D. (1998) “Global and local superlinear convergence analysis of Newton-type methods for semismooth equations with smooth least squares.” In Fukushima, M. and Qi, L. (eds.): Reformulation – nonsmooth, piecewise smooth, semismooth and smoothing methods. Boston MA: Kluwer Academic Publishers, pp.181-209


Conference papers

  • Jansen, M., Oraiopoulos, N. and Ralph, D. (2014) “Contracting for continuity of mission critical services.” In: INFORMS Annual Meeting, 9-12 November 2014, San Francisco, CA, USA.
  • Ralph, D. and Smeers, Y. (2010) “The invisible hand for risk averse investment in electricity generation.” In Chen, B. (ed.): International Conference on Algorithmic Aspects in Information and Management, 6th, 19-21 July, Weihai, PRC.
  • Ralph, D. (2006) “Complementarity models and the architecture of energy markets.” In: International Symposium on Mathematical Programming (ISMP), 19th, 30 July-4 August 2006, Rio de Janeiro, Brazil.
  • Ralph, D., Xu, H. and Meng, F. (2006) “Regularization methods for stochastic mathematical programs with complementarity constraints.” In: European Conference on Operational Research, 21st (EURO XXI), 2-5 July 2006, Rejkjavik, Iceland.
  • Hu, X. and Ralph, D. (2001) “Nash equilibria for games in competitive electricity markets under network constraints.” In Li, D. (ed.) Proceedings of the International Conference on Optimization: Techniques and Applications (5th), 15-17 December 2001, Hong Kong. Hong Kong: Contemporary Development Company, pp.1851-1858
  • Jiang, H., Ralph, D. and Tin Loi, F. (1997) “Identification of yield limits as a mathematical program with equilibrium constraints.” In Grzebieta, R.H., Al-Mahaidi, R. and Wilson, J.L. (eds.): Australasian Conference on The Mechanics of Structures and Materials, 15th, Balkema, Rotterdam. Rotterdam: Balkema, pp.399-404

Working papers

  • Holmberg, P., Newbery, D. and Ralph, D. (2008) “Supply function equilibria: step functions and continuous representations.” Electricity Policy Research Group Working Papers, No.EPRG0829. Cambridge: University of Cambridge.
  • Hu, X., Ralph, D., Ralph, E.K., Bardsley, P. and Ferris, M.C. (2004) “Electricity generation with looped transmission networks: bidding to an ISO.” Judge Institute of Management, Cambridge University, Research Paper No.2004/16


News and insights

Man entering lines of code in a cool office.

Firms are wrestling with how to convince staff to use artificial intelligence (AI) and other new technologies. A study led at Cambridge Judge, focusing on social comparisons among employees, cautions against a false dichotomy between full and no adoption.

Daniel ralph

From taking a risk at Cambridge Judge Business School to founding the CJBS Centre for Risk Studies, we meet Danny Ralph, Professor of Operations Research, Academic Director of the Centre for Risk Studies (CRS), Director of Studies in Management Studies and Fellow of Churchill College. This article is part of our MBA Teaching Spotlight series.…

Fire, water and earth.

aculty and other experts at Cambridge Judge Business School can offer expert opinion on various issues that may arise at the COP26 climate-change summit in Glasgow. If you would like to contact any of these faculty members, please email press-publicity@jbs.cam.ac.uk

Media coverage

Cambridge Independent | 1 November 2021

Risilience nets £6m to cut risks of climate change scenarios

Risilience, a new company that commercialises research from the Centre for Risk Studies at Cambridge Judge Business School, is launched with a £6 million Series A investment. The Risilience platform’s company-specific analysis provides detailed, quantified results to support strategic decision making and business planning while balancing investment requirements driven by future scenarios – and is deemed of particular significance as the climate breakdown curveball weaves its way through global, national and local economies. Risilience’s founders are Dr Andrew Coburn, CEO, Professor Daniel Ralph, Chairman, Dr Michelle Tuveson, Chief Client Officer, and Simon Ruffle, Chief Product Officer.

Financial Times | 21 October 2020

Crisis management courses prepare EMBA students for the worst

Daniel Ralph, Professor of Operations Research at Cambridge Judge Business School comments on contingency planning. Professor Ralph teaches Cambridge Executive MBA participants about decision making in uncertain situations and what consequences that might bring. “It sounds elementary, but if you don’t have an inquiring mind, you are less well equipped to deal with change,” he says.

Asia Insurance Post | 10 September 2020

Global annual average cat losses rise almost eight times in 50 years

Higher insurance penetration usually speeds recovery from natural disasters, but not in the US due to a fragmented insurance market, says new report from the Centre for Risk Studies at Cambridge Judge Business School. “The report looks mostly at vulnerable communities, but there also are clearly lessons for corporates in terms of preparing for catastrophe, investing in ways to recover more quickly, and more effective decision-making and implementation if disaster strikes,” said Professor Daniel Ralph.

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