The other day I wrote about supply chains and  disasters. Today I will deal with something that is much less catastrophic and write about supply chains and glitches. However, to the shareholders, a supply chain glitch may be just as disastrous (pun intended) as a supply chain disaster. In The effect of supply chain glitches on shareholder wealth from 2003, Kevin B Hendricks and Vinod R Singhal investigate the shareholder wealth effects of supply chain glitches that resulted in production or shipment delays, using a sample of 519 announcements made during 1989-2000. Here they find that glitch announcements on average decrease shareholder value by near 11%. How did they arrive at this value?

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