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 drgnum.txt2016-04-22 11:13 330  
 mdc.txt2016-04-22 11:13 327  
Apache/2.4.53 (FreeBSD) OpenSSL/1.1.1t-freebsd mod_apreq2-20090110/2.8.0 mod_perl/2.0.12 Perl/v5.34.3 Server at data.nber.org Port 443