Hello!

fundnr year mktrf smb hml mom mf_u_mnret
1 2015 .59 -2.97 1.85 -7.37 .0218749
1 2012 -.85 -.52 -.47 3.83 1.48305
1 2015 -1.12 3.05 -.45 2.97 -1.489463
1 2015 -3.11 -.57 -3.47 3.86 -2.498645
1 2012 -6.19 .02 -.62 6.62 -4.18537
1 2012 2.55 .41 1.28 -2.48 .7284
1 2012 .78 .59 -.96 .38 1.436699 [...]

Does anyone know how to calculate the monthly excess return for SMB, HML, MOM and MKTRF? mf_mnret stands for 'Win. Monthly Net Return on fundlevel using TNA VW of Share Class Returns' . I tried to generate an excess with: gen excessReturn = mf_u_mnret - rf (which i am unsure of) and dont know how to go further. Thank you in advance!
The goal is to reach the following table II of Carhart in https://onlinelibrary.wiley.com/doi/...1997.tb03808.x (page 62)