1.經(jīng)濟(jì)效益產(chǎn)生影響的時(shí)間比較長 2.經(jīng)濟(jì)效益產(chǎn)生影響的范圍比較廣 3.經(jīng)濟(jì)效益較實(shí),結(jié)余或利潤較虛