[论文解读] Delusion and Deception in Large Infrastructure Projects: Two Models for Explaining and Preventing Executive Disaster

Bent Flyvbjerg, Massimo Garbuio+1 more|arXiv (Cornell University)|Mar 28, 2013

Infrastructure Resilience and Vulnerability Analysis被引用 7

一句话总结

本文 identifies delusion and deception as root causes of cost overruns and delays in large infrastructure projects, proposing two models—optimism bias and strategic misrepresentation—to explain and prevent executive disasters. It advocates for financial accountability, independent audits, and risk-sharing mechanisms to improve forecast accuracy and project outcomes.

ABSTRACT

The Economist recently reported that infrastructure spending is the largest it is ever been as a share of world GDP. With $22 trillion in projected investments over the next ten years in emerging economies alone, the magazine calls it the "biggest investment boom in history." The efficiency of infrastructure planning and execution is therefore particularly important at present. Unfortunately, the private sector, the public sector and private/public sector partnerships have a dismal record of delivering on large infrastructure cost and performance promises. This paper explains why and how to solve the problem.

研究动机与目标

• To explain why large infrastructure projects consistently suffer from cost overruns, schedule delays, and benefit shortfalls.
• To distinguish between systemic optimism bias and deliberate strategic deception as key drivers of project failure.
• To develop actionable models for preventing executive disasters through improved governance and accountability.
• To provide prescriptive measures for reducing over-optimistic forecasting in public and private infrastructure planning.

提出的方法

• Develops a dual-model framework: (1) optimism bias, rooted in cognitive heuristics like overconfidence and the availability heuristic, and (2) strategic deception, driven by incentives to misrepresent costs and benefits to secure funding.
• Applies behavioral economics and principal-agent theory to analyze decision-making in multi-tiered project governance structures.
• Proposes institutional reforms such as shared financial responsibility, minimum local contributions, and risk ownership to align incentives.
• Introduces audit mechanisms and criminal penalties for deliberate misrepresentation to deter strategic deception.
• Uses case studies (Toll Collect, Eurotunnel, Sydney Opera House) to validate the models and illustrate real-world consequences.
• Recommends placing financial responsibility on bidders and contractors for scope increases and delays to reduce opportunistic behavior.

实验结果

研究问题

• RQ1 Why do large infrastructure projects consistently experience cost overruns and delays despite rigorous planning?
• RQ2 To what extent are these failures driven by cognitive biases (e.g., optimism bias) versus deliberate strategic deception?
• RQ3 How can financial and institutional incentives be realigned to reduce over-optimistic forecasting in project approval processes?
• RQ4 What governance mechanisms can effectively prevent both delusion and deception in infrastructure project planning?

主要发现

• In a study of 20 countries, 90% of large infrastructure projects experienced cost overruns, with average overruns at 45% and 25% exceeding 60%.
• The Sydney Opera House cost 1,400% over its original budget, illustrating extreme optimism bias in planning and political under-bidding.
• Eurotunnel’s cost forecasts were doubled in real terms, and its share price collapsed after overruns and benefit shortfalls became evident.
• Toll Collect’s project lost €156 million per month in revenue due to software delays, with total overruns estimated at €6.5 billion.
• Strategic deception was evident in Eurotunnel’s 1987 IPO, where 10% was claimed as a buffer for unforeseen costs, but actual overruns were far higher.
• The paper concludes that 80% of project failures stem from a mix of optimism bias and strategic deception, not just technical or external uncertainties.