_dta:
  1.  by Jean Roth , jroth@nber.org , 11 May 2018

ndctype:
  1.  based on ndclength and dashloc

  obs:       119,085                          
 vars:             6                          11 May 2018 11:37
 size:     3,096,210                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
--------------------------------------------------------------------------------------------------------------------------------------------
ndc             str10   %10s                  Product National Drug Code (NDC)
ndclength       byte    %9.0g                 Length NDC
dashloc         byte    %9.0g                 Location of DASH in NDC Value
ndctype         str5    %9s                 * NDC Type:  4-4-2, 5-3-2, or 5-4-1
lblcode         str5    %9s                   Labeler code portion of NDC; First portion of NDC
prodcode        str4    %9s                   Product code assigned by firm; Second portion of NDC
                                            * indicated variables have notes
--------------------------------------------------------------------------------------------------------------------------------------------
Sorted by: lblcode  prodcode