In the 1960s, manufacturers of hair dye aired TV commercials claiming that “Blondes Have More Fun” and “Gentlemen Prefer Blondes.” For years thereafter, purchases of blonde hair colorings were a significantly higher share of total U.S. dye purchases. In the early 2000s, women’s tastes began to change. More top female stars of stage and screen are brunettes. In addition, the numbers of Asian, Hispanic, and Arabic women, who are largely brunettes, has increased. Finally, graying women in the aging Baby Boomer generation find that darker colors cover gray better and require less maintenance.

What do you suppose has happened to the demand for brunette hair dyes in the 2000s? What about the demand for blonde hair dyes?