Back كلود س. هوبكينز Arabic Клод Хопкинс Bulgarian Claude C. Hopkins Czech Claude C. Hopkins German Claude C. Hopkins Spanish Claude C. Hopkins Basque Claude C. Hopkins French Claude C. Hopkins Italian
Claude C. Hopkins (1866–1932) was an American advertising executive and author. He introduced the slogan in advertising and popularised the use of test campaigns, especially using coupons in direct mail, to properly attribute marketing spend.