I read several papers talking about the so called dust settling period for a impulse response function (IRF) derived from VAR.
e.g., Nijs, Vincent R., et al. "The category-demand effects of price promotions." Marketing science 20.1 (2001): 1-22.
Basically, the dust settling period refers to the time interval before convergence of IRF is obtained. The key is to find the point at which IRF becomes stable or reaches convergence level. But the papers do not provide detailed description about how to find such point. Can any one help or refer to some useful reading material? I googled but was unable to find useful stuff.