Input Value With Double Quotes

general trend is toward products that use fewer atoms. We might not notice this because, while individual items use less material, we use more items as the economy expands and we thus accumulate more stuff in total. However, the total amount of material we use per GDP dollar is going down, which means we use less material for greater value. The ratio of mass needed to generate a unit of GDP has been falling for 150 years, declining even faster in the last two decades. In 1870 it took 4 kilograms of stuff to generate one unit of the U.S.’s GDP. In 1930 it took only one kilogram. Recently the value of GDP per kilogram of inputs rose from $1.64 in 1977 to $3.58 in 2000—a doubling of dematerialization in 23 years.

A learning curve—measured as the percentage unit cost reduction realized with each doubling of cumulative production volume—is typically steepest when labor and machinery add significant value in the production process, as with aircraft assembly or semiconductor manufacturing. Value-added refers to the difference between a product’s final cost and the cost of raw material inputs; this difference consists mostly of labor and equipment costs. Learning-by-doing—for example, finding a way to cut setup times for a new production run—often yields labor and equipment cost savings.

the total amount of material we use per GDP dollar is going down, which means we use less material for greater value. The ratio of mass needed to generate a unit of GDP has been falling for 150 years, declining even faster in the last two decades. In 1870 it took 4 kilograms of stuff to generate one unit of the U.S.’s GDP. In 1930 it took only one kilogram. Recently the value of GDP per kilogram of inputs rose from $1.64 in 1977 to $3.58 in 2000—a doubling of dematerialization in 23 years.