hiː ɪz mˈoʊst nˈoʊn fɔːɹ dɪvˈɛləpɪŋ, ˌɪndᵻpˈɛndəntli ʌv bɹˈɪɾɪʃ ɪkˈɑːnəmˌɪst ɹˈɔɪ fˈɔːɹbz hˈæɹɑːd, wˌʌt hɐz bɪkˌʌm təbi nˈoʊn æz ðə hˈæɹɑːd dəmˈɑːɹ mˈɑːdəl ʌv ˌiːkənˈɑːmɪk ɡɹˈoʊθ.
He is most known for developing, independently of British economist Roy Forbes Harrod, what has become to be known as the Harrod–Domar model of economic growth.