of value in what we're offering. PM: I'm sure you are also familiar with the issues going on in the market research industry today, especially around random digit dial polling and the difficulty research firms face in getting a representative sample using telephones. Landlines are going away - it's more expensive and time consuming to call mobiles phones and there's no real solution on the internet for getting a probability-based sample. What we're trying to do is figure out a way we can do that while focusing on improving the experience of the person answering the question. Not only do we have a huge publisher network in our AdSense product - with hundreds of thousands of websites signed up to display ads - we also have millions of advertisers that have market research needs, so we can create this marketplace that is sustainable and scalable. We can have millions of people answering surveys on a monthly basis, larger than any other sample provider out there. Google has the scale to do close to probability-based sampling. Are the AdSense and Google Consumer Surveys networks separate? PM: The publishers in the GCS network are a subset of the AdSense network. Can you put a figure on the size of the GCS network? PM: We don't have a figure to share with you, but we do see almost two million unique users a month answering surveys. Google touts the simplicity of its survey tool as one of its strengths, but when it comes