Vacancy rate is calculated by dividing space available through either direct lease or sublease by total inventory. The Index is based on the median home price, median family income and interest rates. The 1999 gure is the average of the rst three quarters. Apartment data are from surveys conducted by Realfacts of all apartment complexes in Santa Clara county of 40 or more units. Excluded are subsidized housing, Section 8 or HUD housing and senior complexes.
Rental rates are the average of all types of units.
Rates are the prices charged to new residents when apartments turn over. The 1999 gure is as of September 30. Gazelles are measured from rst quarter to rst quarter. For the Index of Silicon Valley , only investments in rms located in Silicon Valley were included. Collaborative Economics estimated the 1999 total venture capital funding level based on the rst three quarters and historical growth patterns in the fourth quarter.