6.
(), , , . (.6.1.). ( ) (business cycle) , . , . : 1) (peak), ; 2) (trough), ( ).
(.6.1.()): 1)
(recession), . (depression). 1929-1933 ; 2) (recovery), .
, (.6.1.()), , , , ( ) : 1) I (boom), . ( , ) . (, , ). (overheated economy); 2) (recession slump). ( ), , , , ; 3) (crisis) (stagnation). , . , .. ; 4) IV . , , , , .