Consumers often choose not directly from the commodities that they purchase but from commodities they transform into goods through a household production function. It is these goods that they value. The idea was originally proposed by Gary Becker, Kelvin Lancaster, and Richard Muth in the mid-1960s. The idea was introduced simultaneously into macroeconomics in two separate papers by Jess Benhabib, Richard Rogerson, and Randall Wright (1991); and and Zvi Hercowitz (1991). Household production theory has been used to explain the rise in married female labor-force participation over the course of the 20th century, as the result of labor-saving appliances. More recently with the rise of the DIY or Maker movement household production has become more sophisticated. For example, consumers can no