A hurdle model is a modified count model that also assumes a relatively high frequency of zeros, but is set up as a two-stage data generation process rather than as a mixture distribution. In his most recent blog post, Keith Goldfeld, DrPH, MS, MPA of the IMPACT Design and Statistics Core discusses using a hurdle model in the context of planning a new study to address COVID-19 infection rates in nursing homes using much more aggressive testing strategies. Read the full blog post here.