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Strategic Sourcing Under Severe Disruption Risk : Learning Failures and Under-Diversification Bias
Problem definition: We study sourcing behavior in severe conditions where supply disruptions are rare but carry the potential of wiping out several rounds worth of a firm’s profit. Academic/practical relevance: The tradeoff between scale economies from supplier consolidation and risk mitigation from supplier diversification is at the core of firms’ sourcing strategy and one that is empirically understudied. Methodology: We study supplier diversification through a behavioral lens and test theoretically derived predictions under controlled laboratory conditions. Results: Our data provide strong evidence for under-diversification. We posit that this pattern is partly because of the fact that investing in supplier diversification involves an upfront cost to achieve a delayed, and rarely encountered, benefit. Managerial implications: Under-diversification bias is costly, and its causes are difficult to overcome, presenting firms with the daunting task of devising debiasing mechanisms that reinforce a supplier diversification strategy when the rarity of disruptions almost always render supplier consolidation the ex post preferred strategy.
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