***Δείκτης: επενδυτική συνεισφορά κλάδων

residential tends to lead the economy, equipment and software is generally coincident, and nonresidential structure investment trails the economy.
...
As always, residential investment is the investment area to follow - it is the best predictor of future economic activity.

http://www.calculatedriskblog.com/2009/02/investment-contributions-to-gdp.html