Roberto James afite impamyabumenyi y'icyiciro cya kabiri cya kaminuza mu mitekerereze y'abantu, yibanda ku myitwarire y'abaguzi no guteza imbere ingamba zo kugurisha. Ni umuvugizi akaba n'umwanditsi w'ibitabo "The Consumer is in a Hurry: Run with Him or Run After Him" na "Experiencing American Retail: A Journey into the Heart of Consumption."