*Requires that matched VCs have synthetics with all startups in the market (should be redundant now?)
*Requires there to tbe >=5 and <=10 real matches in a market
**This reduces the number of obs from 445,710 to just 59,205(13.3%)
*Requires the year to be >=1990 and <=2001
**142,738 out of 445,710 (32%), or 18,055 out of 59,205