Professor Helen Walker

2026

• Walker, H. et al. 2026. Measuring what matters: A systematic literature review of impact assessment in sustainable construction procurement. Cleaner and Responsible Consumption 23 100485. (10.1016/j.clrc.2026.100485)
• Strand, V. et al. 2026. Uniting for impact: business–NGO collaborations against modern slavery in supply chains. Supply Chain Management 31 (5), pp.777-791. (10.1108/SCM-10-2025-1057)
• Walker, H. and Flynn, A. 2026. Public procurement strategy. In: Dimanda, A. , Brunjes, B. and Patrucco, A. S. eds. The Essential Guide to Public Procurement: Bridging Theory and Practice. Taylor & Francis Group. , pp.105-124. (10.4324/9781003566670-10)
• Li, Y. et al. 2026. The interface of sustainability and risk in supply chain management: Insights and implications. International Journal of Engineering Business Management 18 18479790251411164. (10.1177/18479790251411164)
• Lotfi, M. and Walker, H. 2026. Beyond paper compliance: why supply chains struggle to confront forced labour. www.restructurelab.org: Re:Structure Lab. Available at: https://www.restructurelab.org/policy-briefs/cooperation-and-punishment-bcf9y.

2025

• Lotfi, M. and Walker, H. 2025. See no evil, hear no evil, speak no evil? Barriers to modern slavery risk management in supply chains: an empirical investigation. Production Planning and Control 36 (8), pp.1044-1059. (10.1080/09537287.2024.2335496)
• Jones, A. et al. 2025. Conceptualising supply chain resilience within social enterprises. Business Strategy and the Environment (10.1002/bse.70682)
• Li, Y. et al., 2025. How to balance sustainability and risk in supply chain management: a manufacturing perspective [Abstract]. Presented at: IPSERA Rotterdam, Netherlands 30 March - 02 April 2025.

2024

• Alexander, A. et al. 2024. Innovation for zero-deforestation sustainable supply chain management services: a performance measurement and management approach. Supply Chain Management 29 (3), pp.620-641. (10.1108/SCM-02-2023-0088)
• Strand, V. et al. 2024. A systematic literature review of modern slavery in supply chain management: State of the art, framework development and research opportunities. Journal of Cleaner Production 435 140301. (10.1016/j.jclepro.2023.140301)
• Strand, V. et al. 2024. Tackling modern slavery in supply chains through B2N collaborations. Presented at: POMS 2023: Production and Operations Management Society International Conference Paris, France 18-20 July 2023.

2022

• Alexander, A. , Walker, H. and Delabre, I. 2022. A decision theory perspective on wicked problems, SDGs and stakeholders: the case of deforestation. Journal of Business Ethics 180 , pp.975-995. (10.1007/s10551-022-05198-8)
• Marques, L. , Touboulic, A. and Walker, H. 2022. Sustainable supply chain management and theory: taking stock and looking ahead. In: Childe, S. and Soares, A. eds. Handbook of Research Methods for Supply Chain Management. Handbooks of Research Methods in Management series Edward Elgar Publishing Ltd. , pp.339-351. (10.4337/9781788975865.00027)
• Moretto, A. et al., 2022. Procurement organisation in project-based setting: a multiple case study of engineer-to-order companies. Production Planning and Control 33 (9-10), pp.847-862. (10.1080/09537287.2020.1837938)
• Strand, V. et al. 2022. A systematic literature review of modern slavery risk management in the global supply chains: State of the art and research opportunities. Presented at: IPSERA 2022 Conference Jönköping, Sweden 10 -13 April 2022.

2021

• Lotfi, M. , Walker, H. and Rendon-Sanchez, J. 2021. Supply chains’ failure in workers’ rights with regards to the SDG compass: a doughnut theory perspective. Sustainability 13 12526. (10.3390/su132212526)
• Kelly, S. et al., 2021. Supplier satisfaction with public sector competitive tendering processes. Journal of Public Procurement 21 (2), pp.183-205. (10.1108/JOPP-12-2020-0088)
• Jones, A. et al. 2021. Conceptualising supply chain resilience within social enterprises. Presented at: 25th International Symposium on Logistics (ISL 2021) Virtual 12-13 July 2021. Published in: Pawar, K. S. , Potter, A. and Jimo, A. eds. Proceedings of the 25th International Symposium on Logistics (ISL 2021). Nottingham University. , pp.77.

2020

• Flynn, A. and Walker, H. 2020. Corporate responses to modern slavery risks: An institutional theory perspective. European Business Review 33 (2), pp.295-315. (10.1108/EBR-05-2019-0092)
• Wontner, K. L. et al. 2020. Maximising “community benefits” in public procurement: tensions and trade-offs. International Journal of Operations and Production Management 40 (12), pp.1909-1939. (10.1108/IJOPM-05-2019-0395)

2019

• Patrucco, A. S. et al., 2019. Which shape fits best? Designing the organizational form of local government procurement. Journal of Purchasing and Supply Management 25 (3) 100504. (10.1016/j.pursup.2018.06.003)

2018

• Alexander, A. , Kumar, M. and Walker, H. 2018. A decision theory perspective on complexity in performance measurement and management. International Journal of Operations and Production Management 38 (11), pp.2214-2244. (10.1108/IJOPM-10-2016-0632)
• Lu, H. et al. 2018. Exploring sustainable supply chain management: A social network perspective. Supply Chain Management 23 (4), pp.257-277. (10.1108/SCM-11-2016-0408)
• Pettit, S. et al. 2018. Theoretical developments in humanitarian aid supply chain management. Presented at: 9th European Decision Science Institute Conference Udine, Italy 3-6 June 2018.

2016

• Meehan, J. , Touboulic, A. and Walker, H. 2016. Time to get real: The case for critical action research in purchasing and supply management. Journal of Purchasing and Supply Management 22 (4), pp.255-257. (10.1016/j.pursup.2016.08.006)
• Alexander, A. E. and Walker, H. 2016. Symbolic or substantive claims: an analysis of planetary boundary impacts from tracing supply chains of UK based companies. Presented at: Euroma Sustainable Operations and Supply Chain Forum Lancaster UK 11-12 April 2016. Euroma Sustainable Operations and Supply Chain Forum.
• Alexander, A. E. and Walker, H. L. 2016. Decision making in sustainable supply chain management: cross-sector case studies of implementation. Presented at: IPSERA 2016 Dortmund, Germany 20-24 March 2016. IPSERA 2016 Proceedings. Dortmund, Germany:
• Touboulic, A. and Walker, H. 2016. A relational, transformative and engaged approach to sustainable supply chain management: the potential of action research. Human Relations 69 (2), pp.301-343. (10.1177/0018726715583364)

2015

• Walker, H. et al. 2015. Theoretical perspectives in operations management: an analysis of the literature. International Journal of Operations and Production Management 35 (8), pp.1182-1206. (10.1108/IJOPM-02-2014-0089)
• Lu, H. et al. 2015. Informal relationships and their impacts on supply chain management. Presented at: 20th International Symposium on Logistics Bologna, Italy 5-8 July 2015. Proceedings of the 20th International Symposium on Logistics, Bologna, 5th - 8th July. , pp.195-202.
• Touboulic, A. and Walker, H. L. 2015. Love me, love me not: A nuanced view on collaboration in sustainable supply chains. Journal of Purchasing & Supply Management 21 (3), pp.178-191. (10.1016/j.pursup.2015.05.001)
• Touboulic, A. and Walker, H. L. 2015. Theories in sustainable supply chain management: a structured literature review. International Journal of Physical Distribution & Logistics Management 45 (1/2), pp.16-42.
• Walker, H. L. 2015. New development: Public procurement research at IPSERA: aligning research and practice, and future trends. Public Money and Management 35 (2), pp.141-144. (10.1080/09540962.2015.1007710)
• Wontner, K. et al. 2015. Barriers and enablers to "living wage" in public sector contracts. Presented at: 24th Annual IPSERA Conference Amsterdam, The Netherlands 30 March - 2 April 2015.

2014

• Alexander, A. , Walker, H. L. and Naim, M. M. 2014. Decision theory in sustainable supply chain management: a literature review. Supply Chain Management 19 (5/6), pp.504-522. (10.1108/SCM-01-2014-0007)
• Touboulic, A. , Chicksand, D. and Walker, H. 2014. Managing imbalanced supply chain relationships for sustainability: A power perspective. Decision Sciences 45 (4), pp.577-619. (10.1111/deci.12087)
• Nordigarden, D. et al., 2014. Outsourcing decisions - the case of parallel production. International Journal of Operations and Production Management 34 (8), pp.974-1002. (10.1108/IJOPM-06-2012-0230)
• Walker, H. et al. 2014. Sustainable operations management: recent trends and future directions [Editorial]. International Journal of Operations and Production Management 34 (5)(10.1108/IJOPM-12-2013-0557)
• Alexander, A. , Touboulic, A. and Walker, H. L. 2014. Making sense of SSCM: How companies express sustainable supply chain management issues in their public reports. Presented at: 1st Euroma Sustainability Forum Groningen, The Netherlands 24-25 March 2014.

2013

• Alexander, A. and Walker, H. L. 2013. Sustainable supply chain management: achieving optimal performance and outcomes. Presented at: 20th EurOMA Conference 2013 Dublin, Ireland 7-12 June 2013.
• Alexander, A. and Walker, H. L. 2013. Sustainable supply chain management and decision making: A literature review of decision analysis, stakeholders and systems theory. Presented at: IPSERA2013 Nantes, France 24-27 March 2013.
• Schneller, E. et al., 2013. Systems of exchange: cooperative purchasing in the UK and US health sectors. In: Harland, C. , Nassimbeni, G. and Schneller, E. eds. The SAGE Handbook of Strategic Supply Management. SAGE Publications. , pp.214-238.
• Walker, H. L. , Alexander, A. and Touboulic, A. 2013. An overview of sustainable public procurement research. In: Balancing Social, Environmental and Economic Considerations in Procurement. Supplement to the Annual Statistical Report on United Nations Procurement Vol. 2012.United Nations. , pp.8-14.
• Walker, H. L. et al. 2013. Collaborative procurement: a relational view of buyer-buyer relationships. Public Administration Review 73 (4), pp.588-598. (10.1111/puar.12048)

2012

• Chicksand, D. et al., 2012. Theoretical perspectives in purchasing and supply chain management: an analysis of the literature. Supply Chain Management: an International Journal 17 (4), pp.454 -472. (10.1108/13598541211246611)
• Nordigården, D. et al., 2012. Outsourcing strategies – combining outsourcing with in-house production. Presented at: IPSERA Conference Naples, Italy 1-4 April 2012.
• Touboulic, A. , Chicksand, D. and Walker, H. L. 2012. Power in sustainable supply chain management. Presented at: IPSERA Conference Naples, Italy 1-4 April 2012.
• Touboulic, A. and Walker, H. L. 2012. Action research in sustainable SCM. Presented at: Academy of Management Conference Boston, MA, USA 3-7 August 2012.
• Walker, H. L. and Brammer, S. 2012. The relationship between sustainable procurement and e-procurement in the public sector. International Journal of Production Economics 140 (1), pp.256-268. (10.1016/j.ijpe.2012.01.008)
• Walker, H. L. and Jones, N. 2012. Sustainable supply chain management across the UK private sector. Supply Chain Management 17 (1), pp.15-28. (10.1108/13598541211212177)

2011

• Brammer, S. and Walker, H. L. 2011. Sustainable procurement in the public sector: an international comparative study. International Journal of Operations & Production Management 31 (4), pp.452-476. (10.1108/01443571111119551)
• Brandon-Jones, E. , Brandon-Jones, A. and Walker, H. L. 2011. Sustainable services: A conceptual framework. Presented at: 18th International Annual EurOMA Conference: Exploring Interfaces Cambridge, UK 3-6 July 2011.
• Preuss, L. and Walker, H. L. 2011. Psychological barriers in the road to sustainability: evidence from public sector procurement. Public Administration 89 (2), pp.493-521. (10.1111/j.1467-9299.2010.01893.x)
• Schotanus, F. et al., 2011. Development of purchasing groups during their life cycle: from infancy to maturity. Public Administration Review 71 (2), pp.265-275. (10.1111/j.1540-6210.2011.02337.x)
• Touboulic, A. et al. 2011. Theoretical perspectives on sustainable supply chain management: A review of the literature. Presented at: 20th Annual IPSERA Conference 2011 Maastricht, the Netherlands 10-13 April 2011.
• Walker, H. L. , Brandon-Jones, A. and Brandon-Jones, E. 2011. Exploring service sustainability. Presented at: EUROMA Conference Cambridge, UK 3-6 July 2011.
• Walker, H. L. , Brandon-Jones, E. and Brandon-Jones, A. 2011. Exploring service sustainability. Presented at: 22nd Annual POMS Conference Reno, Nevada, USA 29 April - 2 May 2011.

2010

• Chicksand, D. et al., 2010. Theoretical perspectives in supply chain management. Presented at: 19th Annual IPSERA Conference Lappeenranta, Finland 16–19 May, 2010.
• Chicksand, D. et al., 2010. Theoretical perspectives in purchasing and supply: An analysis of the literature. Presented at: 19th Annual IPSERA Conference: Supply Management - Missing Link in Strategic Management? Lappeenranta, Finland 6-19 May 2010.
• Walker, H. L. et al. 2010. Theoretical perspectives in operations management: an analysis of the literature. Presented at: 17th International Annual EurOMA Conference Porto, Portugal 6-9 June 2010.
• Walker, H. L. and Walley, P. 2010. Sustainability as a sixth performance. Presented at: 17th International Annual EurOMA Conference Porto, Portugal 6-9 June 2010.
• Walley, P. and Walker, H. L. 2010. Sustainability as a sixth performance. Presented at: 17th International Annual EurOMA Conference Porto, Portugal 6-9 June 2010.

2009

• Hampson, J. , MacKenzie, N. and Walker, H. L. 2009. Case studies in sustainable and responsible procurement. Presented at: 18th IPSERA Conference Supply Management – Towards an Academic Discipline? Wiesbaden, Germany 5 – 8 April 2009. Proceedings of the 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. International Purchasing and Supply Education and Research Association (IPSERA). , pp.1112-1123.
• Walker, H. L. 2009. Sustainable procurement: a literature review. Presented at: 18th IPSERA Conference: Supply Management – Towards an Academic Discipline? Wiesbaden, Germany 5–8 April 2009. Proceedings of the 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. International Purchasing and Supply Education and Research Association (IPSERA). , pp.742-756.
• Walker, H. L. 2009. Sustainable procurement: An analysis of constructs in the literature. Presented at: 16th International Annual EurOMA Conference Gothenburg, Sweden 14-17 June 2009.
• Walker, H. L. and Bakker, E. 2009. Collaborative procurement across the UK public sector. Presented at: 18th Annual IPSERA Conference Wiesbaden, Germany 5- 8 April 2009.
• Walker, H. L. and Bakker, E. 2009. Collaborative procurement: A relational view across the UK public sector. Presented at: 18th IPSERA Conference: Supply Management – Towards an Academic Discipline? Wiesbaden, Germany 5–8 April 2009. Proceedings of the 18th IPSERA Conference: Supply Management – Towards an Academic Discipline?, Wiesbaden, Germany, 5–8 April 2009. International Purchasing and Supply Education and Research Association (IPSERA). , pp.757-772.
• Walker, H. L. and Phillips, W. 2009. Sustainable procurement: emerging issues. International Journal of Procurement Management 2 (1), pp.41-61. (10.1504/IJPM.2009.021729)

2008

• Walker, H. L. , Knight, L. and Gough, S. 2008. Sustainable procurement and learning. Presented at: 3rd International Public Procurement Conference Amsterdam, Netherlands 28-30 August 2008.
• Walker, H. L. et al. 2008. Choosing an organisational form: the case of collaborative procurement initiatives. International Journal of Procurement Management 1 (3), pp.297-317. (10.1504/IJPM.2008.017527)
• Walker, H. L. and Brammer, S. 2008. Sustainable e-procurement: An international study. Presented at: 17th Annual IPSERA Conference Perth, Australia 9-12 March 2008.
• Walker, H. L. and Brammer, S. 2008. Sustainable procurement and management commitment. Presented at: 14th Annual International Sustainable Development Research Conference New Delhi, India 21-23 September 2008.
• Walker, H. L. , Di Sisto, L. and McBain, D. 2008. Drivers and barriers to environmental supply chain management practices: lessons from the public and private sectors. Journal of Purchasing and Supply Management 14 (1), pp.69-85. (10.1016/j.pursup.2008.01.007)
• Walker, H. L. et al. 2008. Greening operations management: an online sustainable procurement course for practitioners.. Journal of Management Education 33 (3), pp.348-371. (10.1177/1052562908323190)
• Walker, H. L. , Harland, C. and Warrington, J. 2008. Commissioning and procurement. Presented at: Third International Public Procurement Conference Amsterdam, Netherlands 28-30 August 2008.
• Walker, H. L. and Harland, C. 2008. E-procurement in the United Nations: influences, issues and impact. International Journal of Operations & Production Management 28 (9), pp.831-857. (10.1108/01443570810895276)
• Walker, H. L. et al. 2008. Reflections on longitudinal action research with the English National Health Service. Journal of Purchasing and Supply Management 14 (2), pp.136-145. (10.1016/j.pursup.2008.02.003)
• Walker, H. L. and Preuss, L. 2008. Fostering sustainability through sourcing from small businesses: public sector perspectives. Journal of Cleaner Production 16 (15), pp.1600-1609. (10.1016/j.jclepro.2008.04.014)

2001

• Chicksand, D. et al., 2001. Global sourcing: implications for purchasing and logistics – a research synthesis. Presented at: Global Sourcing Workshop Courchevel, France 14-17 March 2011.