Linking 2018 basic monthly data to ASEC

Hello, I linked all other BMS datasets to ASEC except for Year 2018 (I used merge m:1 marbasecidp using “CPS1994_ASEC.dta” command).

When I tried to link them in 2018, STATA said that it could not find the MARBASECIDP variable. When I checked the 2018 dataset, BMS did not have MARBASECIDP while 2018 ASEC had MARBASECIDP linking variables. Are there any other ways to link 2018 BMS and ASEC or when will the MARBASECIDP for 2018 BMS available?

MARBASECIDP has been more or less superseded by CPSIDP. This is available in all recent samples.