According to Shields 2003, recognizing the national influence national share is an aspect to be considered before testing the local competitive component because its behavior will affect local industry. It so happens that the effect of the national component is felt strongly during the peaks and declines of the economic cycle, that is, during boom times and recessions.
De acuerdo con Shields 2003, un aspecto a considerar antes de someter a prueba el componente competitivo local es reconocer la influencia nacional national share ya que su comportamiento repercutirá en la industria local; sucede que el efecto del componente nacional se hace sentir con fuerza durante las cúspides y declives del ciclo económico, es decir, durante los tiempos de bonanza y recesión.