@Rockhead,
Rockhead wrote:In 46 years I've never been polled.
That wasn't my question. My question was, are you actively looking for work? Are you sending your resume to companies? Have you had interviews? Have you told employment agencies that you're looking? Have you told friends that you're looking? If your answer to any of these question is "yes", you are unemployed by the "official", U3 definition---whether you have been polled or not.
Rockhead wrote:how do they choose the poll members?
They don't. Basically, they send questionnaires to a large number of random households---I'm going to guess something like 300,000, or one American in a thousand. In each of those questionnaires, they ask things like: "Are you currently employed? Part-time or full-time? If part-time, would you
like to work full time? If you're not currently unemployed, are you actively looking?" (And so forth.) From the responses, statisticians then calculate the various unemployment rates.
This is the one-paragraph version of what they're doing. If it
really interests you, go to the BLS site and
check out the link I posted earlier. They go into much more detail.