 So for the entire country, we're at about double the cost of production, the physical cost, the actual physical cost of doing it. How do we know? The standard method here, which goes back to economists Glaser and Jerko, is to take a look at very similar homes that have different amounts of land and then use the extra price of the house with extra land to measure what is the value of land that does not have the actual permission to build anything on it.