If we're seriously going to ask "The next Silicon Vallley?" then it's worth asking if Boston, NYC, etc would look all that different.<p>In fact, I would gander that there must be metropolitan areas of the world that have more startups per square mile/km.<p>Israel is 20,000km/sq<p>NYC is 1,200 km/sq (metro area 30,670 km/sq, but we can discount a lot of it if we're just looking for a concentration)<p>Boston metro area is 12,000km/sq<p>I'd imagine the "concentration" is higher in these two cities, but maybe not. Does anyone have any data?<p><i>EDIT:</i> boston.areastartups.com claims that Boston has 1511 startups. This map lists 628.