What does that even mean? Half of GDP or half the increase in GDP? Over what period?
Remember what was said and then fan it out to every other industry that is related in any manner. "related to housing sales, construction and spending from home equity loans."
housing sales, for example when broken down is going to cover a percentage of the marketing industry, advertising industry, sales industry, communications industry, banking and loans, brokerages, with all the leased vehicles, new vehicle sales, rental vehicles, etc. used by that portion of the industry. And so on.