ripple-down effect
n.— «Direct impact is based upon film-related jobs for everyone from electricians and carpenters, animal trainers and helicopter pilots to homeowners, caterers and restaurateurs. What’s called the “ripple-down effect” led to the estimates of $37 million for the county and $46 million for the city and county combined.» —“Film crews pumped $37M into economy last year” by Mike Hodgson Lompoc Record (Santa Maria, California) Apr. 29, 2007. (source: Double-Tongued Dictionary)