I have a question about occupation 151030 in this document: https://usa.ipums.org/usa/volii/acsoccsoc.shtml
Can I treat this as equivalent to 15113X for the purpose of measuring occupation job growth over time?
Yes, for analysis over time, the codes 151030 and 15113X both identify computer software engineers/developers in the OCCSOC ACS codes. The reason for this coding change is due to several relatively minor differences in the coding schemes between the 2009 and 2010 ACS samples.