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What happens if you offer a mobile option to your web panel? Evidence from a probability-based panel of internet users https://peterlugtig.com/publication/2014_toepoel_what_happens_if_you_offer/
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What happens if you offer a mobile option to your web panel? Evidence from a probability-based panel of internet users https://peterlugtig.com/publication/2014_toepoel_what_happens_if_you_offer/
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