Investment creates jobs. When a particular region or community is favorable to a particular industry sector or company, it will choose that specific place to build a facility and conduct its' operations. These investment dollars go towards building the actual facility, utilities, sanitary sewer, water, telecommunications, equipment, and other business needs. One of the most important metrics of these sorts of investments is the number of jobs created. This is the metric that media outlets and politicians love to broadcast.
It's actually the private investment dollars that communities and economic development entities compete for. That's because investment is usually a direct indicator of confidence and growth.
In a nutshell, here is a basic description of the job creation process: 1) A plant expansion, location, or re-location requires new machines and machine operators. 2) New machines increase output, which necessitates more inventory handlers, shippers, salespeople, managers, etc. 3) The new jobs add to the local income and tax base and create wealth and employment opportunities in the community.
I came across some wonderful news for my hometown of Dalton, GA, earlier this morning in it's Daily Citizen Newspaper. An investment of $450M by carpet tycoon Robert "Bob" Shaw is projected to create 2,000 news in the area. Read the article here.