My first guess is period of time in the early 70's known as The Great Inflation. Primarily driven by the abolishing of the gold standard. Not sure what the gold

My first guess is period of time in the early 70's known as The Great Inflation. Primarily driven by the abolishing of the gold standard. Not sure what the gold mining to construction rate was prior to this point but thereafter they could print it faster than they could build and this type of inflation where there is little growth in actual output creates asset bubbles. Just like this latest episode of quantitative easing has led to housing price inflation around the world right now.