Response Time Improvement from a New Rescue: Culver City Fire Department
By Jacob Kohlhepp | Last Updated: 4/9/2019 | Culver City Fire Department
This report estimates one additional rescue would have reduced the response time of 584 calls by more than 3 minutes between July 1, 2017 and June 30, 2018. To get this estimate, we use 4,013 vehicle-response times for Rescue 41 and 43 and assume the new rescue would be placed at Station 2. We model travel response time using driving distance, location within Culver City, response district, building type, day of the week, and weather conditions as explanatory variables. We estimate this model with median regression. Using this model, we predict changes in response time among the 1,282 calls that would have been assigned to this additional rescue. According to these predictions, 584 calls (45%) would see response time savings of more than 3 minutes. In general, 90% (1,153 calls) would see response time improvements of 51 seconds or more.
Statistical Review of Competing Findings in Fine Particulate Matter and Total Mortality Studies
By Jacob Kohlhepp | Last Updated: 9/28/2018 | Scientific Integrity Institute
This report examines the competing findings from a series of articles written by Enstrom and Pope et al. These articles disagree regarding the link between particulate matter pollution and mortality. This link is very important, because it is one of the main reasons for state and federal emissions regulations. Our report evaluates the statistical arguments and conducts a random and fixed effect meta-analysis. We conclude that both parties make reasonable criticisms of the other party, and these criticisms warrant the release of all data behind the relevant studies.
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Download: Meta-Analyses Detailed Calculations