_dta:
  1.  by Jean Roth , jroth@nber.org , 12 Oct 2018
  2.  NBER URL:  http://www.nber.org/data/fda-orange-book-data.html
  3.  Source Page: http://www.fda.gov/Drugs/InformationOnDrugs/ucm129662.htm
  4.  Source File URL: www.fda.gov/downloads/Drugs/InformationOnDrugs/UCM163762.zip
  5.  Source Text File: exclusivity.txt

appl_type:
  1.  New Drug Application Type
  2.  The type of new drug application approval.
  3.  New Drug Applications (NDA or innovator) are "N". Abbreviated New Drug Applications (ANDA or generic) are "A".

appl_no:
  1.  New Drug Application (NDA) Number.  The FDA assigned number to the application.  Format is nnnnnn.

product_no:
  1.  Product Number The FDA assigned number to identify the application products.
  2.  Each strength is a separate product.  May repeat for multiple part products.  Format is nnn.

exclcode:
  1.  Exclusivity Code.  Code to designate exclusivity granted by the FDA to a drug product.  Format is nnnnnnnnnn.

excldate:
  1.  Exclusivity Date.  The date the exclusivity expires. Format is MMM DD, YYYY.

  obs:         1,766                          
 vars:             6                          12 Oct 2018 11:56
 size:        51,214                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
-------------------------------------------------------------------------------------------------------------------------------------------
appl_type       str1    %9s                 * Application Type
appl_no         long    %12.0g              * Application Number
product_no      byte    %8.0g               * Product Number
exclcode        str7    %9s                 * Exclusivity Code
excldatestr     str12   %12s                  Exclusivity Date String
excldate        float   %td                 * Exclusivity Date
                                            * indicated variables have notes
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Sorted by: appl_type  appl_no  product_no  exclcode  excldatestr  excldate