This subdirectory contains all custom R functions and utilities needed to run
the SAGE build stream and model.

contents:

cps_asec.R
  compiles cps asec data for use in both calculating population totals within
  model households and income tax returns to generate marginal tax rates. the
  program relies on nber's stored cps ascii data files.
  used in build/get_population_data.R, build/get_tax_data.R

download_file.R
  program for downloading files from the internet
  used by other R functions

install_R_packages.R
  program for verifying needed R packages are installed on the local machine's
  package directory. the default cran mirror is set to repos =
  "http://cran.rstudio.com/".

R_utilities.R
  container holding all other custom functions designed to efficiently run the
  modeling framework's build stream and model. also contains functions for
  handling data and plotting results.
