Matching sample based on multiple variables

[Seyed Mahmoud Hosseinniakani]

Hi,
I have two samples. Sample 1 (main sample) includes 200 companies from Sweden. Sample 2 includes 5000 companies from the US. Using sample 2, I want to find one match company for each company includes in sample 1. I want to find my match sample based on sic code (company industry identity), assets (company's assets value), ROA and audit fees.
All the companies are identified by a specific identity number, ISIN number. Both samples show the variables: sic code, year, assets, ROA and audit fees.

I would be grateful if one could help me that how can I find the match based on the several variables or criteria.

Note:
I am using mac and Stata 15.

Best regards,
Mahmoud

[Rich Goldstein]

presumably you want to match some of the variables exactly and others within a caliper of some size (not shown in your question); if you want to match without matching to more than one member of the other file, I recommend the user-written "calipmatch"; if you want to match but allowing each observation to match more than once, I recommend the user-written "vmatch"; use -search- to find and download

added in edit: to be clearer (maybe), -calipmatch- is for matching without replacement and -vmatch- for matching with replacement

[Seyed Mahmoud Hosseinniakani]

Thank you for the guide Rich.
I tried with the code below and faced with the r(122). Unfortunately, I have no understanding of caliperwidth and do not know how to fix it. Could you please tell me how can I determine a proper caliperwidth?

. calipmatch, generate(newvar) casevar(case) maxmatches(1) calipermatch(Size Lev
> erage ROA) caliperwidth(5)
must specify the same number of caliper widths as caliper matching variables.
r(122);

Kind regards,
Mahmoud

[Rich Goldstein]

sorry but the "proper" caliper width depends on subject matter knowledge; I don't know anything about your study and cannot comment on that

as for the error message, you must have one caliper width for each variable listed in your caliper match earliest; you list 3 variables but only 1 width (I generally do not use this program as I generally want "with replacement" and thus, this is my understanding of the help file - someone else who actually uses this program may be able to clarify better)

edited to fix some typos automatically inserted

[Seyed Mahmoud Hosseinniakani]

Thank you Rich!