Read through the first to sections of the “Paradise Lost and Regained: Transportation Innovation, Income and Residential Location”, by Stephen LeRoy and Jon Sonstelie. Found here: http://econ.ucsb.edu/~jon/Publications/ParadiseLost.pdf

Then answer the following prompt:

In Paradise Lost and Regained LeRoy and Sonstelie indicate the transition from the Paradise Lost stage to the Paradise Regained was delayed in the early 1900s by the introduction of a particular mode of transportation. What was that mode of transportation and briefly explain how it delayed the transition to the urban regentrification observed in the 1970s?