The Law of Variable proportion.

                       If   one  input is variable  and  all other  inputs are fixed , the  firm’s  production  function exhibits the law of  variable  proportion. If the number  of units  of a variable  inputs is  increased  , keeping  other  inputs  constant , how  output  change  is  the  concern  of this  law . Suppose  land , plant and equipment are  the  fixed  factors , and  labor,  the  variable  factor.When  the  number  of labors is  increased  successively  , to have  larger  output  the  proportion  between  fixed  and  variable  factors is  altered  and the  law of  variable  proportions sets in .  The  law  states   that  , as  the  quantity  of a  variable  inputs is  increased  by  equal  does  keeping  the  quantities  of  other  inputs  constant,  total product  will increase , but  after  a point at a diminishing  rate .  The  law  of  variable  proportions [ or  the  law  of  non proportional returns] is  also  known  as  the  law  of  diminishing  returns  .  But  the  law  of  diminishing  returns  is  only one  phase  of  the  move comprehensive  law  of  variable  proportions . —-#—-END.

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