The multiplier effect, is when one job in the mining industry creates 4 new jobs in other industries

yes

The travel multiplier measures the effect of the initial tourism spending and the chain of spending that follows.

The multiplier effect describes how an increase in some economic activity starts a chain reaction that generates more activity than the original increase. The multiplier effect demonstrates the impact that reserve requirements set by the Federal Reserve have on the U.S. money supply.

Multiplier Effect