The characteristic features of star-forming systems with prevalence of effects of induced star-formation (SF) are considered. Several mechanisms of induced SF are known: stimulation by stellar activity, by spiral density waves, by galactic mergers and tidal interactions. Properties of such systems can be described by four basic models: (i) self-regulated wave of SF; (ii) self-regulated starburst; (iii) SF-wave and (iv) starburst stimulated by external influence. In the first two cases, excitation of SF is caused by activity of stars of previous generation.