By defining different types of cities, one would use social factors as well as economic and political factors to categorize the cities.
baɪ dᵻfˈaɪnɪŋ dˈɪfɹənt tˈaɪps ʌv sˈɪɾiz, wˈʌn wʊd jˈuːz sˈoʊʃəl fˈæktɚz æz wˈɛl æz ˌiːkənˈɑːmɪk ænd pəlˈɪɾɪkəl fˈæktɚz tə kˈæɾɪɡɚɹˌaɪz ðə sˈɪɾiz.