Total-factor productivty (TFP) addresses any effects in total output not caused by inputs or productivity. For example, a year with unusually good weather will tend to have higher output, because bad weather hinders agricultural output. A variable like weather does not directly relate to unit inputs or productivity, so weather is considered a total-factor productivity variable.
The equation below (in Cobb-Douglas form) represents total output (Y) as a function of total-factor producitivy (A), captial input (K), labor input (L), and the two inputs' respective shares of output. In economics, the Cobb-Douglas functional form of production functions is widely used to represent the relationship of an output to inputs. ...
ERS produces totalfactorproductivity measures for the aggregate farm sector from production accounts that distinguish multiple outputs and inputs, adjust for quality change in each input category, and recognize that some farm production (e.g., breeding livestock) is an investment good as well as an agricultural output.
Productivity growth in the U.S. farm sector is wholly a function of the productivity trends in individual States.
Moreover, its productivity relative to Connecticut fell from one-half in 1960 to one-third in 1996.
Technology Growth and Efficiency are regarded as two of the biggest sub-sections of TotalFactorProductivity, the former possessing "special" inherent features such as positive externalities and non-rivalness which enhance its position as a driver of economic growth.
TotalFactorProductivity is often seen as the real driver of growth within an economy and studies reveal that whilst labour and investment are important contributors, TotalFactorProductivity may account for up to as much as 60% of growth within economies.
Growth accounting exercises and TotalFactorProductivity are open to the Cambridge Critique.
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