However , one of the most influential economists of the time , Alfred Marshall , commented in his review of Mathematical Psychics :
The mathematics was similarly difficult , and a number of his creative applications of mathematics to economic or moral issues were judged as incomprehensible .
One of the most influential economists of the time , Alfred Marshall , commented in his review of Mathematical Psychics :
The mathematics was similarly difficult , and a number of his creative applications of mathematics to economic or moral issues were judged as incomprehensible .