i take some slides from other ppt of other for that i am very sorry and just want to shar wht i have add on this take a look

2.  Market means a particular place where
buyer and seller meet each other and buy
and sell commodities .
 But in economics it doesn’t mean any
particular place but it means a entire area
where buyers and sellers of commodity area
in such contact with each other that price of
commodity tends to be one throughout the
area.................... .

3.  Area
 Buyers and Sellers
 One commodity
 Free competition

19. Perfect Monopolistic Monopoly
r Large large one
Homogeneous Product differentiation Homogeneous
Uniform Not uniform Not uniform
firms Free entry Not absolute freedom Not possible
of market Perfect knowledge Imperfect Imperfect
Perfect Imperfect Imperfect
ity of perfect Relatively Relatively
enue AR=MR AR>MR AR>MR
Not req. Very significant Seldom
price control Price taker Partial control over price Price maker

20.  The end