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I am interested in getting aggregate dollar values for listings/sales on Zillow (for the whole country summed together, for example). Unfortunately, Zillow's data page seems to only show the "ZHVI", an index value, not a total dollar value. Is there any way to get the total dollar value?

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    $\begingroup$ This is not an economics question $\endgroup$ – tohster Feb 15 '15 at 20:29
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    $\begingroup$ I disagree, estate data can be used for economic research. There has been a lot using house prices as collateral. However, for these very specific things, the open data stack exchange might be more useful. $\endgroup$ – FooBar Feb 15 '15 at 20:49
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    $\begingroup$ @tohster You must be one of those "theoretical economists" who does not use data. $\endgroup$ – Lassie Fair Feb 15 '15 at 21:39
  • $\begingroup$ @FooBar Housing prices are extremely relevant. But this is a question about how to extract data from a site. For example, I could ask "how to I get access to JSTOR in order to retrieve some economics papers". Yes, the end-result is economics-related, but the question is not. $\endgroup$ – tohster Feb 15 '15 at 21:44
  • $\begingroup$ So you believe that asking how to program a Bellman iteration would be off topic on this site, too? Since it is not about economics, but rather about problems with a related tool? Anywho, this is not the place, meta would be. $\endgroup$ – FooBar Feb 15 '15 at 22:21
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To answer your question of whether you can get a number for 'total home value,' the answer is no–at least not easily.

Zillow (somewhat) recently made available a data set similar to what you are searching for. I suspect, however, that they do not want the public to have access to aggregated value because it would showcase the volatility of Zillow home value estimates, i.e. their algorithm-based estimate fluctuates much more than the estimates coming out of research institutions, etc.

Sorry for the dissatisfying answer!

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They now provide values in dollars for several metrics related to median home value. For example, a graph using the data at the state level:

$\hspace{3cm}$enter image description here

(code for figure here)

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