At Statistics Canada they have a concept of respondent burden. Basically it means you try to limit the number of questions you ask people whilst still trying to get the answers in. Is this information available from another survey?
May I suggest a more formal arrangement where a survey is organised say every three / six months and researchers submit their questions to be included in the survey? This is done for a number of surveys at Statistics Canada and is a useful way to include one or two additional / supplementary questions to a survey. The advantage to the people running the studies is hopefully a wider set of respondents making their surveys more statistically valid. The advantage to the mappers are fewer messages in the mailing lists and fewer surveys asking to be completed. At the very least I'm sure Zoe and Laura could see if the data from their surveys could feed the other. There are other things that could be done such as random sampling then following up with the randomly selected sample this reduces self selection. Thoughts? Thanks John
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