I am looking at the CPS survey, and it seems there are 3 separate variables that all ask the same question. If someone responds that they are looking for work, they are asked “what are all the things you have been doing to look for work?” There are three slight variations of this same question, which correspond to variables LKPS, LKDK, and LKM. Are these variables essentially the same? Or do they correspond to different lead in questions (for example, does one correspond to an employed person saying they are looking for work)? I cannot find any documentation that makes this clear.