Homes in older cities are valued less than in newer cities. Maintenance cost for homes in older cities is the same as in newer cities. Maintenance cost for homes in older cities is higher than in newer cities. Maintenance cost for homes in older cities is lower than in newer cities. Worth Shows the strongest results - based on rejected predictions, this combination of cities describe one type of relationship, there exist cities in the US with older housing stock that are highly valued.
Maintenance is high because it is a proportion of the value of the home.
Further Research Could look at other combinations of cities - could examine within characteristics of the city to see if other factors matter. With respect to maintenance cost, based on my research of owner-occupied homes in the US, I have found that the following factors matter. 15 years - cost remains constant for homes that are older than 15 years. Perhaps older homes that are more costly to maintained are removed from the housing market or converted into rentals. This result hold for households who purchase new and old structures.