Replication materials for paper Glyphosate exposure and GM seed rollout unequally reduced perinatal health

Requirements

We run the analysis using make version 4.4.1 and R version 4.4.1. We use renv to manage packages. To get started, install renv and run renv::restore() to download and install the package versions used in this project, which are recorded in the renv.lock file.

make data-clean will generate all of the intermediate files we need for the analysis, which takes about 4 minutes to run. This does not run two categories of targets: downloading data and the water ML pipeline. Those both take a while to run, along with the data we downloaded manually---they are grouped together in the data/download-manual, data/download-script, and data/watershed directories.

make data-raw will create all of the files in the data/raw directory, make data-clean creates all of the files in the data/clean directory, make water creates all of the files in the data/watershed directory, and make data-download creates all of the files in the data/download-script directory.

For analysis:

• make desc-figs will create the descriptive time series plots and maps, as well as some appendix figures
• make cnty-results runs the county level analysis (event studies, DiD, TSLS for many outcomes and different treatment vars) and creates the event study figures. It also does the Ag district level analysis
• make predict-bw runs scripts to train birthweight prediction models and generate predictions for each birth
• make micro-mods runs the birth-level analysis
• make micro-results creates figures from the birth-level analysis

API keys

The following API keys are required, save them to .Renviron with with usethis::edit_r_environ()

• USDA QuickStats API saved in .Renviron as NASS_KEY
• Census API saved in .Renviron as CENSUS_KEY
• BEA API saved in .Renvoron as BEA_KEY

Data not included

Most data required for our analysis is included in this repository, but some files are too large or not allowed to be shared publicly.

NCHS data

Instructions on how to get access to the restricted Births (Natality) and Deaths (Mortality) files are on the NCHS website. Our primary analysis uses the natality files between 1990 and 2013. We do supplemental analysis that uses the mortality files over the same time period. Once obtained, the raw natality and mortality files go into: data/health-restricted/raw.

HydroBASINS

Download the HydroBASINS data for North America and copy the contents into data/watersheds/hydrobasins.

USGS gridded soil survey

There are two pieces of data from the USGS's gridded soil survey needed for water analysis, which the USGS hosts on Box here:

1. Download MUKEY Grids (TIF)/FY2021_gNATSGO_mukey_grid.zip and place the contents here: data/watersheds/soil-quality/gNATSGO_mukey_grid
2. Download MUKEY Grids (TIF)/FY2021_gNATSGO_Tabular_CSV.zip and place the contents here: data/watersheds/soil-quality/gNATSGO_Tabular_CSV

Other data sources

GAEZ data for Attainable Yield is in data/download-manual/attainable-yield/. These can also be downloaded using the following links:

• Soy high: res05/CRUTS32/Hist/8110H/ylHr_soy.tif
• Soy low: res05/CRUTS32/Hist/8110H/ylLr_soy.tif
• Corn high: res05/CRUTS32/Hist/8110H/ylHr_mze.tif
• Corn low: res05/CRUTS32/Hist/8110H/ylLr_mze.tif
• Cotton high: res05/CRUTS32/Hist/8110H/ylHr_cot.tif
• Cotton low: res05/CRUTS32/Hist/8110H/ylLr_cot.tif

The USDA Agriculutral Statistic District to County FIPS crosswalk is here.