Vertical integration and efficiency: an application to the Italian machine tool industry

This paper analyzes the relationship between firm efficiency and vertical integration in the Italian machine tool (MT) industry. The link may really be the result of a two-way causality: the effect may run from productive efficiency to the type of vertical organization (i.e. vertical integration or outsourcing), as a self-selection mechanism, or an effect from the organizational mode to the firm’s performance may (also) be at work. This relationship is empirically investigated in a novel panel dataset comprising about 500 Italian MT builders, implementing two equations and instrumental variables for the two directions of causality. The evidence clearly indicates the self-selection mechanism of the most efficient firms in vertically integrated structures, while an effect from the organizational mode to the firm’s efficiency is not supported.