hiː bɪɡˈæn hɪz kɚɹˈɪɹ æz ɐn ɐsˈɪstənt pɹəfˈɛsɚ ænd ɹᵻsˈɜːtʃ stˈæf ɪkˈɑːnəmˌɪst æt ðə dᵻpˈɑːɹtmənt ʌv ˌiːkənˈɑːmɪks, jˈeɪl jˌuːnɪvˈɜːsᵻɾi bᵻfˌoːɹ mˈuːvɪŋ tə ðə fˈækəlti ʌv ˌiːkənˈɑːmɪks ʌv θˈæmɐsˌæt jˌuːnɪvˈɜːsᵻɾi æz ɐ ɹˈɑːkɪfəlɚ skˈɑːlɚɹ æt ðɪ ɐdvˈaɪs ʌv pjˈuːi ʌŋɡpˈækɔːɹn hˌuː wʌz ðˈɛn dˈiːn ʌv fˈækəlti.
He began his career as an assistant professor and research staff economist at the Department of Economics, Yale University before moving to the Faculty of Economics of Thammasat University as a Rockefeller scholar at the advice of Puey Ungpakorn who was then dean of faculty.