This was thought the most unusual work of all—insofar as anyone paid attention—by economists in the early 1990s when the work began.
ðɪs wʌz θˈɔːt ðə mˈoʊst ʌnjˈuːʒuːəl wˈɜːk ʌv ˈɔːl—ˈɪnsəfˌɑːɹ æz ˈɛnɪwˌʌn pˈeɪd ɐtˈɛnʃən—baɪ ɪkˈɑːnəmˌɪsts ɪnðɪ ˈɜːli nˈaɪntiːnhˈʌndɹɪd nˈaɪnti z wɛn ðə wˈɜːk bɪɡˈæn.