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Assembly Plant
Photo Credit: The Chrysler 200 Factory Tour, an interactive online experience using Google Maps Business View technology, takes consumers inside the new 5-million-square-foot Sterling Heights Assembly Plant for a behind-the-scenes peek at how the 2015 Chrysler 200 is built.

Natural Hazard Impacts in the Downstream Supply Chain May Exceed the Direct Effects



      DownstreamSupplyThomas and Helgeson (2021)investigated the short-term downstream effects of natural hazards. For instance, the failure of supplies to arrive on time at the factory floor due to a hazard experienced by a supplier. This is an area with limited research, as many studies examine upstream impacts (e.g., the effect of hazards experienced by customers) or long-term downstream impacts (e.g., the effect years after a hazard is experienced by suppliers). Thomas and Helgeson examine the short-term downstream impact, which includes the more immediate effects. They find that during the 2005 to 2016 time period payroll, GDP, and employment in the manufacturing/goods industry supply chain were decreased or suppressed by 2.9 %, 3.9 %, and 8.6 %, respectively due to hazards upstream – that is, due to hazards experienced by suppliers. This can create an incentive misalignment, as the establishment that invests in mitigation efforts and experiences the hazard locally does not directly experience a large portion of the net benefit. The result may be an underinvestment in hazard resilience.

Thomas and Helgeson (2022)further examined the effect of data resolution (for instance, local level data vs. state level data) on examining the effects of hazards. They find that data resolution can obscure the impacts of hazards in some types of studies. Thus, caution should be taken as some studies may underestimate the impacts. An analysis in the same paper showed that an investment of USD 100 billion or less in hazard resilience is economical if it results in a reduction in losses of 10% or more. Moreover, the results of these papers suggests that current estimates of hazard impacts may be underestimates and that there may also be underinvestment in hazard resilience.

Supply Chain Losses Due to Power Disturbances also Exhibit Higher Losses Downstream

      PowerDisturbanceResearch on the downstream supply chain effects of power disturbances byThomas and Fung (2022)shows that:

Power disturbance literature has limited coverage on the downstream economic impact;
	No single method of analysis estimates all power disturbance losses;
	Power disturbances have a statistically significant effect on downstream value added;
	The downstream effect of power disturbances is 0.8% of private value added and 2.3% of manufacturing value added;A $50 billion investment in energy resilience is economical if it reduces direct/indirect losses by 5%.

Power outages in the U.S. affect many firms’ economic activity and are likely to result in downstream supply chain disruptions. Our research suggests that power disturbances have a statistically significant effect on gross domestic product (i.e., value added), particularly in manufacturing where power disturbances in the supply chain had a statistically significant effect. While this industry represents 12.8 % of private industry value added, it experiences 36.8 % of the supply chain losses due to power disturbances. Power disturbances in the supply chain affected all four industries examined (i.e., manufacturing, durable goods manufacturing, nondurable goods manufacturing, and total private industry) with nondurable goods being affected the most. This creates a significant disconnect between the stakeholder that invests in reliability in the power grid and the stakeholders that experience the bulk of losses.

There is Limited Literature on the Short-term Downstream Losses

The losses that result from supply chain disruptions can be classified by the point in the supply chain where the losses occur and the relative time period in which the losses occur. In terms of the supply chain point, losses are incurred by those that experience a disturbance, by those that are supplying the firms that experienced a disturbance (upstream), and by those that are being supplied by the firms that experienced the disturbance (downstream). In terms of the time period in which losses are incurred, there are short-term losses that occur immediately following an event and then there are long-term losses that result from disturbances. Our research examines the short-term downstream impacts from disturbances. This impact includes the losses at downstream firms that might not receive supplies on time due to disturbances at their suppliers’ facilities.

Table 2 from Thomas and Fung (2022) categorizes literature on power disturbances by the point in the supply chain where the measured losses occurred and the relative time period in which the measured losses occurred. The literature has significant coverage of the losses that occur at the establishments that experience a power disturbance and at the time of the disturbance. There are also a number of papers discussing upstream losses and long-term losses; however, we did not identify literature examining the downstream short-term losses. That is, the immediate shortages or delays that result from having suppliers that experience a power disturbance. Additional literature searches in Thomas and Helgeson (2021) and Thomas and Helgeson (2022) found similar results regarding natural hazards disrupting supply chains.

Table 2 from Thomas and Fung (2022): Literature on Economic Impacts ofElectricity Disruption by Time of Loss and Supply Chain Point

      EcoLiterature**For more information please see the NIST research below:**

Thomas, Douglas and Juan Fung (2023) “Power Disturbances: An Examination of Short-Term Losses in the Downstream Supply Chain.”  ASSA 2023 Annual Meeting. New Orleans, LA. January 6–8, 2023. https://www.aeaweb.org/conference/2023/program/paper/BzdNZsQN

Thomas, Douglas and Jennifer Helgeson (2022). “The Effect of Natural Hazard Damage on Manufacturing Value Added and the Impact of Spatiotemporal Data Variations on the Results.” Int J Disaster Risk Sci 13.https://doi.org/10.1007/s13753-022-00438-x

Thomas, Douglas and Juan Fung. (2022). “Measuring downstream supply chain losses due to power disturbances.” Energy Economics, Volume 114,https://doi.org/10.1016/j.eneco.2022.106314

Thomas, Douglas and Jennifer Helgeson. (2021). “The effect of natural/human-made hazards on business establishments and their supply chains.” International Journal of Disaster Risk Reduction. Volume 59.https://doi.org/10.1016/j.ijdrr.2021.102257

    
    Contacts
      
        

Douglas Thomas
    
      
  douglas.thomas@nist.gov
  (301) 975-4918

Created January 4, 2023, Updated November 7, 2023
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