An application of the ‘voting with your feet’ technique for comparing consumption bundles is made by Rosenberg and Birdzell to compare life on the medieval manor with life in the medieval town:
(p. 51) The path of escape was from manor to town, not from town to manor. Stadluft macht frei, as the German proverb went.
Rosenberg, Nathan, and L.E. Birdzell, Jr. How the West Grew Rich: The Economic Transformation of the Industrial World. New York: Basic Books, 1986.
(Note: italics in original.)