In 2014, the National Agricultural Statistics Service (NASS) engaged the National Academies of Sciences, Engineering, and Medicine to convene a planning committee to organize a public workshop for an expert open discussion of their then-current livestock models. The models had worked well for some time. Unfortunately beginning in 2013, an epidemic that killed baby pigs broke out in the United States. The epidemic was not fully realized until 2014 and spread to many states. The result was a decline in hog inventories and pork production that was not predicted by the models. NASS delayed the workshop until 2019 while it worked to develop models that could help in times both of equilibrium and shock (disease or disaster), as well as alternative approaches to help detect the onset of a shock. The May 15, 2019, workshop was consistent with NASS's 2014 intention, but with a focus on a model that can help predict hog inventories over time, including during times of shock. This publication summarizes the presentations and discussions from the workshop. Table of ContentsFront Matter1 Introduction2 Motivation and Challenges3 The Quarterly Hog Inventory Survey4 Setting Official Estimates: The Hog Board5 Modeling Efforts6 Web-Scraping Effects7 Modeling Swine Population Dynamics8 Discussion of Detection and Monitoring9 Discussion of Modeling10 Discussion of State-Level Estimation11 Discussion of Visions for the FutureReferencesAppendix A: Agenda and List of ParticipantsAppendix B: Biographical Sketches of Planning Committee Members and SpeakersCommittee on National Statistics
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