Since the holes are valued at cost, and filling them in also valued at cost, and since the peasants working in the Lord sector are well paid, better paid than ordinary peasants, though not quite as well paid as the lord and his retainers, and since the Lord and his retainers also took a modest pay rise for arranging all this prosperity, total value produced, total GDP is now a whopping eight hundred and fifty thousand sacks of wheat, a fourfold rise in GDP. One of the Lord’s retainers is an economist, who gets a Nobel prize for explaining that the Lord has done such a good job.