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Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical , electric power , mechanical work , light (radiation), or heat .
Productivity is the efficiency of production of goods or services expressed by some measure. Measurements of productivity are often expressed as a ratio of an aggregate output to a single input or an aggregate input used in a production process, i.e. output per unit of input, typically over a specific period of time. [ 1 ]
For example, if α = 0.45, a 1% increase in capital usage would lead to approximately a .45% increase in output. Sometimes the term has a more restricted meaning, requiring that the function display constant returns to scale , meaning that increasing capital K and labor L by a factor k also increases output Y by the same factor, that is, Y ( k ...
In economics, a production function gives the technological relation between quantities of physical inputs and quantities of output of goods. The production function is one of the key concepts of mainstream neoclassical theories, used to define marginal product and to distinguish allocative efficiency, a key focus of economics. One important ...
TFP is calculated by dividing output by the weighted geometric average of labour and capital input, with the standard weighting of 0.7 for labour and 0.3 for capital. [3] Total factor productivity is a measure of productive efficiency in that it measures how much output can be produced from a certain amount of inputs.
Productivity in economics is usually measured as the ratio of what is produced (an aggregate output) to what is used in producing it (an aggregate input). [1] Productivity is closely related to the measure of production efficiency. A productivity model is a measurement method which is used in practice for measuring productivity.
where y i is the observed scalar output of the producer i; i=1,..I, x i is a vector of N inputs used by the producer i; is a vector of technology parameters to be estimated; and f(x i, β) is the production frontier function. TE i denotes the technical efficiency defined as the ratio of observed output to maximum feasible output.
Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output ("product") produced per the amount C ("cost") of resources consumed.