Home-building was more labor-intensive then because of cruder tools and equipment, materials were harder to come by and houses were smaller because they didn't include bathrooms or kitchens.

WSJ: Moving Heaven and Earth for a House��WSJ Mansion

The goal is to extract a smaller set of data that can be analyzed, using any of the same visualization or analytical tools that would be used for other data types.

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And ETFs are among the favorite tools of fast-trading hedge funds, which can dart in and out of smaller overseas markets so quickly that market makers occasionally have trouble adjusting share prices in time.

FORBES: Magazine Article